question: In what time a sum of money double itself at 7% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 14 2/7%
(D) 33 4/3%
(E) 73 1/3%
answer: Stream of consciousness: P = (P*7*R)/100
R = 14 2/7% The answer is (C).

q: Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full?
Options:
(A) 22
(B) 12
(C) 88
(D) 99
(E) 27
a: Stream of consciousness: 1/8 + 1/24 = 1/6
6 * 2 = 12 The answer is (B).

question: A deer runs k miles in n hours. How many miles will it run in x hours at the same rate?
Options:
(A) knx
(B) kn
(C) kx2n
(D) kxn
(E) knx
answer: Stream of consciousness: Given Speed = k/n
To Find distance in x hours with same speed
Distance = speed * time
Distance = k/n*x = kx/n The answer is (D).

q: A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in days?
Options:
(A) 22 1/6
(B) 22 1/2
(C) 22 1/0
(D) 22 1/9
(E) 22 1/1
a: Stream of consciousness: 1/18 + 1/30 = 8/90 = 4/45
45/4 = 11 1/4 *2 = 22 1/2 days The answer is (B).

question: A family with 1 mother, 1 father, and 2 children sit in a car with 2 front seats and 3 back seats. If the mother drives with a child in the front, and the father sits in the back center seat with the other two children on either side of him, how many seating arrangements are possible?
Options:
(A) 2
(B) 4
(C) 6
(D) 8
(E) 10
answer: Stream of consciousness: Mother has a fixed place and father, so there are 2! ways to arrange the children, hence The answer is (A).

question: How many two-digit numbers satisfy this property.: The last digit (unit's digit) of the square of the two-digit number is 8 ?
Options:
(A) 1
(B) 2
(C) 3
(D) 4
(E) none of these
answer:
Stream of consciousness: A number ending in 8 can never be a perfect squar The answer is (E).