Reasoning: 90 * 12/60 = 18 kmph
Ans: (B)
Question: The speed of a train is 90 kmph. What is the distance covered by it in 12 minutes?
Options:
(A) 15
(B) 18
(C) 77
(D) 52
(E) 42
Rationale: A = 2000(21/20)2 = 2205
The answer: (A)
Question: A money lender lends Rs.2000 for six months at 20% p.a. rate. It the interest is reckoned quarterly than find the amount given after time limit?
Options:
(A) 2205
(B) 8786
(C) 8275
(D) 2872
(E) 2282
Reasoning: Speed = 50*(5/18) m/sec = 125/9 m/sec
Length of Train (Distance) = Speed * Time
(125/9) * 18 = 250 meter
Ans: (C)
Question: A train running at the speed of 50 km/hr crosses a pole in 18 seconds. Find the length of the train.
Options:
(A) 150
(B) 188
(C) 250
(D) 288
(E) 300
Rationale: 8C3 [Select any four] -5C3 [Select all hard backs] = 46
The answer: (B)
Question: There are 8 books in a shelf that consist of 3 paperback books and 5 hardback books. If 3 books are selected at random without replacement, how many different combinations are there that at least one paperback book is selected?
Options:
(A) 40
(B) 46
(C) 50
(D) 55
(E) 60
Reasoning: P(1 + 20/100)n > 2P or (6/5)n > 2
Now, (6/5 * 6/5 * 6/5 * 6/5) > 2. So, n = 4 years.
Ans: (B)
Question: The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is?
Options:
(A) 3
(B) 4
(C) 5
(D) 6
(E) 7
Reasoning: K + 2K +3 + 3K - 5 + 5K +1 = 11K -1
(11K -1)/4 = 41
11K = 41 * 4 +1 = 164 +1 = 165
K = 165 / 11 = 15.
Ans: (A)
Question: If the average (arithmetic mean) of the four numbers K, 2K + 3, 3K 5 and 5K + 1 is 41, what is the value of K?
Options:
(A) 41
(B) 15 3/4
(C) 22
(D) 23
(E) 25 3/10