q: If the average (arithmetic mean) of the four numbers K, 3K + 3, 3K 4 and 5K + 1 is 60, what is the value of K?
Options:
(A) 11
(B) 15 3/4
(C) 20
(D) 23
(E) 25 3/10
a: Stream of consciousness: K + 3K +3 + 3K - 4 + 5K +1 = 12K
(12K)/4 = 60
12K = 60 * 4 = 240
K = 240/ 12 = 20. The answer is (C).

question: A no. when divided by the sum of 555 and 445 gives 2times their difference as quotient & 30 as remainder. Find the no. is?
Options:
(A) 125786
(B) 158799
(C) 564323
(D) 344567
(E) 220030
answer: Stream of consciousness: (555 + 445) * 2 * 110 + 30 = 220000 + 30 = 220030 The answer is (E).

q: Calculate the speed of a boat in still water (in km/hr) if in one hour, the boat goes 13 km/hr downstream and 10 km/hr upstream.
Options:
(A) 3 kmph
(B) 9 kmph
(C) 4 kmph
(D) 8 kmph
(E) 6 kmph
a: Stream of consciousness: Speed in still water = (13 + 5)1/2 kmph = 9 kmph. The answer is (B).

question: Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
Options:
(A) 12
(B) 14
(C) 27
(D) 53
(E) 86
answer: Stream of consciousness: In this series, each number is repeated, then 13 is subtracted to arrive at the next number. The answer is (B).

q: Rohith,who works in a parcel service, has a certain number of small plastic boxes to pack into parcels. If he packs 3,4,5 or 6 in a parcel, he is left with one over; if he packs 7 in a parcel, none is left over. What is the number of boxes, he may have to pack?
Options:
(A) 223
(B) 301
(C) 377
(D) 1368
(E) 222
a: Stream of consciousness: The required number of boxes is such that it leaves a remainder of 1 when divided by 3, 4, 5 or 6 and no remainder of 1 when divided by 3, 4, 5 or 6 and no remainder when divided by 7. Such a number is 301. The answer is (B).

q: There are 5 fictions and 6 non-fictions. How many cases are there such that 2 fictions and 2 non-fictions are selected from them?
Options:
(A) 90
(B) 120
(C) 150
(D) 180
(E) 200
a:
Stream of consciousness: Number of ways of selecting 2 fiction books = 5C2
Number of ways of selecting 2 non fiction books = 6C2
5C2 * 6C2 = 10 * 15 = 150 The answer is (C).