RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: A certain scholarship committee awarded scholarships in the amounts of $1250, $2500 and $4000. The Committee awarded twice as many $2500 scholarships as $4000 and it awarded three times as many $1250 scholarships as $2500 scholarships. If the total of $52500 was awarded in $1250 scholarships, how many $4000 scholarships were awarded?
A.7
B.6
C.9
D.10
Answer: A.7
Explanation: Since the starting point is given as the $4000 scholarship,
Assume $4000 scholarships to be x
By the given information, $2500 scholarships = 2x
and $1250 scholarships = 6x
Gievn: Total $1250 scholarships = $52500
6x*1250 = 52500
Solve for x = 7
Option A
Question: In a garden, there are yellow and green flowers which are straight and curved. If the probability of picking a green flower is 3/4 and picking a straight flower is 1/2, then what is the probability of picking a flower which is yellow and curved
A.1/8
B.1/6
C.1/4
D.3/4
Answer: A.1/8
Explanation: Good question.
So we have a garden where all the flowers have two properties: color (green or yellow) and shape (straight or curved).
We're told that 3/4 of the garden is green, so, since all the flowers must be either green or yellow, we know that 1/4 are yellow. We're also told there is an equal probability of straight or curved, 1/2.
We want to find out the probability of something being yellow and straight, Pr( Yellow and Straight ).
So if we recall, the probability of two unique events occurring simultaneously is the product of the two probabilities, Pr( A and B ) = P(A) * P(B). So we multiply the two probabilities, Pr(yellow)* Pr(curved) = 1/4 * 1/2 = 1/8, or A.
Question: The angles of a triangle are in the ratio 1:3:8. Find the measurement of the three angles of triangle.
A.100°
B.110°
C.120°
D.140°
Answer: C.120°
Explanation: If the ratio of the three angles is 1:3:8, then the measures of these angles can be written as x, 3x and 8x. Also the sum of the three interior angles of a triangle is equal to 180°. Hence
x + 3x + 8x = 180
Solve for x
12x = 180
x = 15
The measures of the three angles are
x = 15°
3x = 3 × 15 = 45°
8x = 8 × 15 = 120°
C
Question: If the first day of a year (other than leap year) was Friday, then which was the last day of that year?
A.Saturday
B.Friday
C.Tuesday
D.Monday
Answer: B.Friday
Explanation: Explanation :
Given that first day of a normal year was Friday
Odd days of the mentioned year = 1 (Since it is an ordinary year)
Hence First day of the next year = (Friday + 1 Odd day) = Saturday
? Last day of the mentioned year = Friday
Answer : Option B
Question: A man in a train travelling at 28km/hr notices that a train going in the opposite direction passes him in 12 sec.If the length of this train is 210m find its speed .
A.35 km/hr
B.40 km/hr
C.50 km/hr
D.60 km/hr
Answer: A.35 km/hr
Explanation: relative speed of trains = 210/12 mtrs/sec = 210*18/(12*5)= 63 km/hr
speed of 2nd train = 63-28=35 km/hr
ANSWER:A
Question: The mean of 50 observations was 36. It was found later that an observation 43 was wrongly taken as 23. The corrected new mean is
A.35.2
B.36.1
C.36.2
D.36.4
Answer: D.36.4
Explanation: Solution
Correct sum= (36x50+43-23)
= 1820.
âˆ´ Correct mean= 1820 / 50
= 36.4.
Answer D
Question: Sum of the local value and the face value of 4 in the numeral 153489216 is
A.40004
B.4004
C.4000004
D.400004
Answer: D.400004
Explanation: (Local value of 4) + (Face value of 4) = (400000 + 4) = 400004
D
Question: Two numbers N and 16 have LCM = 48 and GCF = 8. Find N.
A.12
B.32
C.24
D.46
Answer: C.24
Explanation: The product of two integers is equal to the product of their LCM and GCF. Hence.
16 * N = 48 * 8
N = 48 * 8 / 16 = 24
correct answer C
Question: Kamal started a business investing Rs. 9000. After five months, Sameer joined with a capital of Rs. 8000. If at the end of the year, they earn a profit of Rs. 6970, then what will be the share of Sameer in the profit?
A.Rs.2329
B.Rs.2380
C.Rs.2329
D.Rs.2320
Answer: B.Rs.2380
Explanation: Kamal : Sameer = (9000 * 12) : (8000 * 7)
= 108:56 = 27:14
Sameer's share = 6970 * 14/41 = Rs.2380.
Answer: B
Question: P(x, y) is the intersection point between the circle (x^2 + y^2 = 4) and the line (y = x +2). Which of the following can be the point P?
A.(1, 2).
B.(2, 0)
C.(0, -2)
D.(-2, 0)
Answer: C.(0, -2)
Explanation: circle x^2+y^2=4 cuts line y=x+2.
so intercept will be x^2+(x+2)^2=4
x(x+1)=0,
x=0 or x=-1.
in the options only c has x=0.
ANSWER:C
Question: If one positive integer is greater than another positive integer by 3, and the difference of their cubes is 279, what is their sum?
A.5
B.7
C.9
D.11
Answer: D.11
Explanation: 1^3 = 1
2^3 = 8
3^3 = 27
4^3 = 64
5^3 = 125
6^3 = 216
7^3 = 343
The two numbers are 4 and 7.
The answer is D.
Question: If x is to be chosen at random from the set {1, 2, 3, 4} and y is to be chosen at random from the set {5, 6, 7, 8}, what is the probability that xy will be even?
A. 1/6
B. 1/3
C. 1/2
D. 2/3
Answer: C. 1/2
Explanation: Probably the best way to solve would be to use 1 - P(opposite event) = 1 - P(odd) = 1 - P(odd)*P(odd) = 1 - 2/4*2/3 = 8/12 = 1/2.
Answer: C.
Question: How many different 4 digit numbers can be formed from the number 1234 by re-arranging its digits so that the odd digits occupy even position
A.2
B.8
C.4
D.7
Answer: C.4
Explanation: There are 2 odd numbers which have to be placed at 2 even places =2!=2 ways
There are 2 even numbers which have to be placed at 2 odd places. So 2! = 2 ways
so total number of ways of arranging all these numbers are 2 * 2 = 4 ways
Answer:C
Question: 2 men and 2 women are lined up in a row. What is the number of cases where they stand with each other in turn? (The number of cases in which men (or women) do not stand next to each other)
A.4
B.15
C.18
D.21
Answer: A.4
Explanation: The list should be WMWMW. Hence, from women 2! And men 2!, we get (2!)(2!)=4. Therefore, the correct answer is A.
Question: The value of a bike depreciates at the rate of 25% every year. It was purchased 2 years ago. If its present value is Rs.4500 , its purchase price was
A.8000
B.7500
C.7000
D.6500
Answer: A.8000
Explanation: Explanation:
= Rs.8000
Answer: A
Question: Two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 4 seconds. The length of the faster train is
A.80 m
B.100 m
C.90 m
D.180 m
Answer: C.90 m
Explanation: Solution
Relative Speed	= (36 + 45) km/hr
= (81 x 5/18) m/sec
= (45/2) m/sec
Length of the train	= (45 / 2 x 4) m
= 90 m.
Answer C
Question: John and Peter are among the ten players a volleyball coach can choose from to field a six-player team. If all six players are chosen at random, what is the probability of choosing a team that includes John and Peter?
A.1/2
B.1/3
C.1/4
D.2/5
Answer: B.1/3
Explanation: The total possible ways of selecting a 6-member team is 10C6 = 210
The possible ways which include John and Peter is 8C4 = 70
The probability of choosing both John and Peter is 70/210 = 1/3
The answer is B.
Question: A gets 3 times as much money as B gets, B gets only Rs.25 more then what C gets. The three gets Rs.675 in all. Find the share of B?
A.186
B.167
C.168
D.140
Answer: D.140
Explanation: A+B+C = 675
A = 3B
3B+B+B-25 = 675
5B = 700
B = 140
Answer: D
Question: Let's play a game. I have all the ten digits of numbers available. I use all the digits just once to create a number of ten digits. Can you find out what number I have in mind using the following clues?
One digit is divisible by 1.
Two digits are divisible by 2.
Three digits are divisible by 3.
Four digits are divisible by 4.
Five digits are divisible by 5.
Six digits are divisible by 6.
Seven digits are divisible by 7.
Eight digits are divisible by 8.
Nine digits are divisible by 9.
Ten digits are divisible by 10.
A.3816547290
B.3816557290
C.3816547280
D.3813547290
Answer: A.3816547290
Explanation: A
3816547290
Question: In a birthday party, every person shakes hand with every other person. If there was a total of 28 handshakes in the party, how many persons were present in the party?
A.5
B.8
C.1
D.9
Answer: B.8
Explanation: Suppose there are nn persons present in a party and every person shakes hand with every other person. Then, total number of handshakes
= nC2=n(n−1)/2
n(n−1)=28×2n(n−1)=56
n=8
Ans: B
Question: A fence consists of m lengths of fence that are each n feet long. A fence post separates each length of fence by its width of x feet. What is the total length H of the fence including the fence posts on each end?
A.mn
B.m(n + x)
C.H=m(n + x) + x
D.m(n + x) + 2x
Answer: C.H=m(n + x) + x
Explanation: Notice that since a fence post separates each length of fence, then there will be m+1 posts, for example if there are m=2 fences, then there will be 3 posts: PFPFP. Thus the total length H of the posts is (m+1)x.
The total length of the fence is mn, therefore the total length of the fence including the fence posts on each end is (m+1)x+mn=mx+x+mn=m(n+x)+x.
Answer: C.
Question: A and B start a business, with A investing the total capital of Rs.50000, on the condition that B pays A interest @ 10% per annum on his half of the capital. A is a working partner and receives Rs.1500 per month from the total profit and any profit remaining is equally shared by both of them. At the end of the year, it was found that the income of A is twice that of B. Find the total profit for the year?
A.59099
B.59009
C.590055
D.59000
Answer: D.59000
Explanation: Interest received by A from B = 10% of half of Rs.50000 = 10% * 25000 = 2500.
Amount received by A per annum for being a working partner = 1500 * 12 = Rs.18000.
Let 'P' be the part of the remaining profit that A receives as his share. Total income of A = (2500 + 18000 + P)
Total income of B = only his share from the remaining profit = 'P', as A and B share the remaining profit equally.
Income of A = Twice the income of B
(2500 + 18000 + P) = 2(P)
P = 20500
Total profit = 2P + 18000
= 2*20500 + 18000 = 59000.Answer: D
Question: If the first day of a year (other than leap year) was Sunday, then which was the last day of that year?
A.Saturday
B.Sunday
C.Tuesday
D.Monday
Answer: B.Sunday
Explanation: Explanation :
Given that first day of a normal year was Sunday
Odd days of the mentioned year = 1 (Since it is an ordinary year)
Hence First day of the next year = (Sunday+ 1 Odd day) = Monday
Therefore, last day of the mentioned year = Sunday. Answer : Option B
Question: 0.002 x 0.008 = ?
A.1.6e-05
B.0.001
C.0.01
D.0.1
Answer: A.1.6e-05
Explanation: Explanation:
2 x 8 = 16.
Sum of decimal places = 6
0.002 x 0.008 = 0.000016
Answer- A
Question: in how many possible ways you can write 3240 as product of 3 positive integers a, b, c .
A.450
B.420
C.350
D.320
Answer: A.450
Explanation: 3240 => 2^3 * 3^4 * 5^1
a => 2^x1 * 3^y1 * 5^z1
b => 2^x2 * 3^y2 * 5^z2
c => 2^x3 * 3^y3 * 5^z3
a * b * c = 3240
x1 + x2 + x3 = 3 => 5C2
y1 + y2 + y3 = 4 => 6C2
z1 + z2 + z3 = 1 => 3C2
5C2 * 6C2 * 3C2 = 10 * 15 * 3 = 450
ANSWER:A
Question: How long does a train 165 meters long running at the rate of 54 kmph take to cross a bridge 660 meters in length?
A.28
B.27
C.55
D.18
Answer: C.55
Explanation: T = (660 + 165)/54 * 18/5
T = 55
Answer: C
Question: A man swims downstream 90 km and upstream 55 km taking 5 hours each time; what is the speed of the current?
A.3.8
B.3.5
C.3.3
D.3.2
Answer: B.3.5
Explanation: 90 --- 5 DS = 18
? ---- 1
55 ---- 5 US = 11
? ---- 1 S = ?
S = (18 - 11)/2 = 3.5
Answer: B
Question: If 21 lines are drawn in a plane such that no two of them are parallel and no three are concurrent, then in how many points do they intersect?
A.150
B.170
C.190
D.210
Answer: D.210
Explanation: If two lines are not parallel, then they will intersect in exactly one point. Lines can be extended infinitely on both ends so somewhere they will intersect with each other if they are not parallel. We are also given that no three lines are concurrent. This means that no three lines intersect at the same point. So every pair of two lines we select will have a unique point of intersection which they will not share with any third line.
The number of ways to select 2 lines from 21 lines is 21C2 = 210
The answer is D.
Question: What is the greatest prime factor of 7!6! + 6!5! ?
A.17
B.23
C.37
D.43
Answer: D.43
Explanation: 7!6! + 6!5! = 6!5!(7*6+1) = 6!*5!*43
The answer is D.
Question: A list of measurements in increasing order is 2, 5, 6, 8, 15 and x. If the median of these measurements is 3/4 times their arithmetic mean, what is the value of x?
A.16
B.18
C.20
D.22
Answer: C.20
Explanation: The median is (6+8)/2 = 7
The mean is (2+5+6+8+15+x)/6 = (36+x)/6
(36+x) /6 * 3/4 = 7
x = 56-36 = 20
The answer is C.
Question: A and B complete a work in 5 days. A alone can do it in 10 days. If both together can do the work in how many days?
A.3.33 days
B.3.99 days
C.2.99 days
D.2.98 days
Answer: A.3.33 days
Explanation: 1/5 + 1/10 = 3/10
10/3 = 3.33 days
Answer: A
Question: If n is a prime number greater than 5, what is the remainder when n^2 is divided by 12 ?
A.0
B.1
C.2
D.3
Answer: B.1
Explanation: There are several algebraic ways to solve this question, but the easiest way is as follows:since we cannot have two correct answers just pick a prime greater than 5, square it and see what would be the remainder upon division of it by 12.
n=7 --> n^2=49--> remainder upon division 49 by 12 is 1.
Answer: B.
Question: A train 2000 m long can cross an electric pole in 25 sec and then find the speed of the train?
A.322
B.324
C.326
D.328
Answer: B.324
Explanation: Length = Speed * time
Speed = L/T
S = 2000/25
S = 80 M/Sec
Speed= 80*18/5 (To convert M/Sec in to Kmph multiply by 18/5)
Speed = 324 Kmph
Answer: B
Question: The average (arithmetic mean) of five numbers is 5. If 2 is subtracted from each of four of the numbers, what is the new average?
A.3.4
B.4.5
C.6.2
D.5.7
Answer: A.3.4
Explanation: Let the numbers be a , b, c , d , e ,f
So, Total of these 5 numbers must be 25
Or, a + b + c + d + e = 25
So, 12 must be subtracted from the total sum
i.e a + b + c + d + e - 8
Or, 25 - 8 = 17
Hence average of the 5 numbers now is 17/5 =>3.4
So, Answer will be A
Question: There are 13 boys and 10 girls in a class. If three students are selected at random, in how many ways that 1 girl or 2 boys are selected ?
A.88
B.90
C.92
D.96
Answer: A.88
Explanation: n(s) = sample space = 23C3 = 1771
E = event that 1 girl and 2 boys are selected
n(E) = we have to select 2 boys from 13 or 1 girl from 10
= 13C2 + 10C1
= 88
Ans - A
Question: When the no.7y86038 is exactly divisible by 11, then the smallest whole no.in place of y?
A.1
B.3
C.5
D.7
Answer: B.3
Explanation: The given number =7y86038
Sum of the odd places =8+0+8+7=23
Sum of the even places = 3+6+y
(Sum of the odd places)- (Sum of even places) = Number (exactly divisible by 11)
23-(9+y) = divisible by 11
14 � y = divisible by 11.
Y must be 3, to make given number divisible by 11.
B
Question: In the xy plane line m has the equation 4x + y = u. Line n passes through the origin and is perpendicular to line m. If point p has the coordinates (r, r+1) and is on both line n and m what is the value of r?
A.-4/3
B.1/4
C.-4
D.3/4
Answer: A.-4/3
Explanation: The equation of line m is y=-4x+u. Now, since line n is perpendicular to line m, then its slope is negative reciprocal of the slope of line m, so the slope of n is 1/4. Next, as line n passes through the origin (0, 0) and has the slope of 1/4 then its equation is y=1/4*x.
Point (r, r+1) lies on line n means that (r+1)=1/4*r --> r=-4/3.
Answer: A.
Question: A car covers a certain distance at aspeed of 60 kmph in 4 hours. To cover the same distance in 2hr, it must travel at a speed of?
A.567 km/hr
B.678 km/hr
C.782 km/hr
D.120 km/hr
Answer: D.120 km/hr
Explanation: Distance = (60 x 4) = 240 km.
Speed = Distance/Time
Speed = 240/2 = 120 kmph
Answer : D
Question: If integers a and b are distinct factors of 30, which of the following CANNOT be a factor of 30?
I. ab + b^2
II. (a + b)^2
III. a + b
A.I only
B.II only
C.III only
D.I and II only
Answer: B.II only
Explanation: Factors of 30 are: 1, 2, 3, 5, 6, 10, 15, and 30.
I. ab + b^2 --> if a=1 and b=2 then ab + b^2=6, which is a factor of 30. OK;
II. (a + b)^2 --> (a + b)^2 is a perfect square, no perfect square (but 1) is a factor of 30. DISCARD;
III. a + b --> if a=1 and b=2 then a + b=3, which is a factor of 30. OK.
Answer: B.
Question: A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
A.1.9
B.1.5
C.1.4
D.1.1
Answer: B.1.5
Explanation: 72 --- 9 DS = 8
? ---- 1
45 ---- 9 US = 5
? ---- 1 S = ?
S = (8 - 5)/2 = 1.5
Answer: B
Question: Anand and Deepak started a business investing Rs. 1000 and Rs. 5000 respectively. Out of a total profit of Rs. 2000, Deepak's share is:
A.3776
B.1284.2
C.8400
D.1666.6
Answer: D.1666.6
Explanation: Ratio of their shares = 1000: 5000= 1:5
Deepak's share = 2000 * 5/6 = Rs. 1666.6.
Answer: D
Question: power windows: 60%
anti-lock brakes: 25%
CD player: 75%
The table above shows the number of vehicles at Bill's car dealership that have certain features. No vehicle has all three features, but 10% have power windows and anti-lock brakes, 15% have anti-lock brakes and a CD player, and 22% have power windows and a CD player. What percent of the vehicles at Bill's car dealership have a CD player but no power windows or anti-lock brakes?
A.25
B.18
C.11
D.38
Answer: D.38
Explanation: Answer: D
Were looking for the number of cars with a CD player but no other features. We know that 40% of the cars have a CD player, 15% have a CD player and anti-lock brakes, while 22% have a CD player and power windows. Since no car has all three features, those account for all of the possibilities except for what were looking for.
If a car has a CD player, it must either have anti-lock brakes, power windows, or no other features. Since the total of cars with a CD player is 75%, we can set up the following equation:
75=15+22+x
x=38, choiceD.
Question: If 3/w + 3/x = 3/y and wx = y, then the average (arithmetic mean) of w and x is
A.1/2
B.1
C.2
D.4
Answer: A.1/2
Explanation: Given: 3/w + 3/x = 3/ywx=y
Find: (w+x)/2 = ?
3(1/w + 1/x) = 3(1/y) - divide both sides by 3
(1/w + 1/x) = 1/y
(x+w)/wx = 1/wx - sub'd in y=wx
x+w - 1 = 0
x+w = 1
Therefore (w+x)/2 = 1/2
Ans: A
Question: A certain shirt was marked down 10% the first week and another 20% the next week. What percent of the regular price was the final cost of the shirt after the two markdowns?
A.30%
B.36%
C.40%
D.72%
Answer: D.72%
Explanation: If the price of the shirt is 100, and it is marked down by 10% and then 20% or charged 90% of the price first and 80% of the price of reduced price, the final price is :-
100*90*80/10000= 72
72% is the final price of old price.
D is the answer
Question: The average of 65 numbers is 40. If two numbers, 25 and 60 are discarded, then the average of the remaining numbers is nearly
A.28.32
B.39
C.39.92
D.29
Answer: C.39.92
Explanation: Explanation :
Total sum of 63 numbers = (65 * 40) - (25 + 60) = 2600 - 85= 2515
Average = 2515/63 = 39.92
Answer : C
Question: what will be the next number in the following series??
1,4...48,100,180,294
A.32
B.46
C.24
D.18
Answer: D.18
Explanation: 1x1x1=1;
2x2x1=4;
3x3x2=18;
4x4x3=48;
5x5x4=100;
6x6x5=180;
7x7x6=294;
so answer is 18.
ANSWER:D
Question: The length of a rectangular plot is thrice its breadth. If the area of the rectangular plot is 675 sq m, then what is the breadth of the rectangular plot?
A.16
B.17
C.18
D.15
Answer: D.15
Explanation: Let the breadth of the plot be b m.
Length of the plot = 3 b m
(3b)(b) = 675
3b2 = 675
b2 = 225
b = 15 m.
Answer: Option D
Question: Sandy leaves her home and walks toward Ed's house. Two hours later, Ed leaves his home and walks toward Sandy's house. The distance between their homes is 52 kilometers, Sandy's walking speed is 6 km/h, and Ed's walking speed is 4 km/h. How many kilometers will Sandy walk before she meets Ed?
A.33
B.34
C.35
D.36
Answer: D.36
Explanation: Sandy walks 12 km in the first two hours so there are 40 km remaining.
When Ed starts walking, they complete a total of 10 km per hour.
They will meet four hours after Ed starts walking.
Since Sandy walks for 6 hours, she walks 36 km.
The answer is D.
Question: Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?
A.17 1/9 min
B.17 1/8 min
C.17 1/7 min
D.17 8/7 min
Answer: C.17 1/7 min
Explanation: 1/20 + 1/30 - 1/40
= 7/120
120/7 = 17 1/7
Answer:C
Question: The probabilities of solving a question by 3students A, B & C are 1/2,1/3 &1/4, respectively. The probability that the problem will be solved is?
A.1/2
B.3/4
C.1/5
D.3/5
Answer: B.3/4
Explanation: Sol. First, we find the probability of not solving the problem x PTO x = (1 — D x - D x - D
1 2 3 1 =iXiX71=4;
1 3 Required probability 3/4
B
Question: Solve 7y – 5 = 3y + 11
A.4
B.6(1/3)
C.7(1/3)
D.3
Answer: A.4
Explanation: Sol.
7y – 5 = 3y + 11
=> 7y – 3y = 11 + 5
=> 4y = 16 => x = 4
Answer A
Question: There were two candidates in an election. Winner candidate received 60% of votes and won the election by 240 votes. Find the number of votes casted to the winning candidate?
A.228
B.720
C.255
D.199
Answer: B.720
Explanation: W = 60% L = 40%
60% - 40% = 20%
20% -------- 240
60% -------- ? => 720
Answer:B
Question: Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?
A.10 : 5
B.15 : 2
C.20 : 2
D.25 : 2
Answer: D.25 : 2
Explanation: Explanation:
Indian stamps are common to both ratios. Multiply both ratios by factors such that the Indian stamps are represented by the same number.
US : Indian = 5 : 2, and Indian : British = 5 : 1. Multiply the first by 5, and the second by 2.
Now US : Indian = 25 : 10, and Indian : British = 10 : 2
Hence the two ratios can be combined and US : British = 25 : 2
Answer: D
Question: If n ≠ 0, which of the following must be greater than n?
I. n^4
II. 2n
III. 2 - n
A.I only
B.II only
C.I and II only
D.II and III only
Answer: A.I only
Explanation: n ≠ 0 => n = negative or n = positive
if n = negative:
2n < n (n = -1 then 2n = -2 => -2 < -1)
n^2 > n (n =-1 then n^2 = 1 => n^2 > n)
2 - n > n (n = -1 then 2--1 = 2+1=3 => 2-n > n)
but if n = positive:
n^2 > n (n = 2 then n^2 = 4 => n^2 > n) => II
2 - n < n(n =2 then 2-2 = 0)
=> only I
=>answer is A
Question: A rectangular lawn of dimensions 120 m * 60 m has two roads each 10 m wide running in the middle of the lawn, one parallel to the length and the other parallel to the breadth. What is the cost of traveling the two roads at Rs.3 per sq m?
A.s.5100
B.s.3900
C.s.3228
D.s.3922
Answer: A.s.5100
Explanation: Area = (l + b – d) d
(120 + 60 – 10)10 => 1700 m2
1700 * 3
= Rs.5100
Answer:A
Question: How much water should be added to 15 liters of a 20%-solution of alcohol to reduce the concentration of alcohol in the solution by 75% ?
A.25 liters
B.27 liters
C.30 liters
D.32 liters
Answer: A.25 liters
Explanation: Let x ltr water to be added
2ltr alcohol to be represented as (20(1-3/4(new soln.=15+x)))
2=5%*(15+x)-------->x=25
Ans A
Question: If 6 coins are tossed, how many different coin sequences will have exactly 3 tails, if all tails have to occur in a row?
A.4
B.8
C.16
D.20
Answer: A.4
Explanation: xactly 3 tails and have to occur in row
We have 6 coins we use the glue method so we say all 3 tails as 1
so we have 4! ways, however we need to reduce duplicate for 3 Heads as well
HHH{T} therefore using anagram method
4!/3! = 4
Answer: A
Question: The average score of a cricketer in 10 matches is 60 and in other 15 matches is 70. Then find the average score in all the 25 matches?
A.50
B.48
C.65
D.66
Answer: D.66
Explanation: Average in 25 matches = (10*60 + 15*70)/10+15 = 66
Answer is D
Question: Ramu bought an old car for Rs. 43000. He spent Rs. 13000 on repairs and sold it for Rs. 64900. What is his profit percent?
A.A)14%
B.B)16%
C.C)18%
D.D)22%
Answer: B.B)16%
Explanation: Total CP = Rs. 43000 + Rs. 13000 = Rs. 56000 and SP = Rs. 64900
Profit(%) = (64900 - 56000)/55000 * 100 = 16%
ANSWER:B