A man, a woman and a boy can complete a job in 3, 4 and 12 days respectively. How many boys must assist 1 man and 1 woman to complete the job in 1/4 of a day?
Options:
(A) 41
(B) 43
(C) 31
(D) 84
(E) 81
Answer and stream of consciousness: (A)
Stream of consciousness: (1 man + 1 woman)'s 1 day work = 1/3 + 1/4 = 7/12
Work done by 1 man and 1 women in 1/4 day = ((7/12) x (1/4)) = 7/48
Remaining work = 1 - 7/48 = 41/48
Work done by 1 boy in 1/4 day = ((1/12) x (1/4)) = 1/48
Therefore, Number of boys required = ((41/48) x 48) = 41

Find the simple interest on Rs.620 for 10 months at 10 paisa per month?
Options:
(A) 277
(B) 620
(C) 640
(D) 678
(E) 121
Answer and stream of consciousness: (B)
Stream of consciousness: I = (620*10*10)/100 = 620

Efrida and Frazer who live 10 miles apart, meet at a restaurant that is directly north of Efrida's home and directly east of Frazer's home. If the restaurant is four miles closer to Efrida's home, than to Frazer's home, how many miles is the restaurant from Frazer's home?
Options:
(A) 6
(B) 7
(C) 8
(D) 10
(E) 11
Answer and stream of consciousness: (A)
Stream of consciousness: It's a simple geometry problem. Look at the diagram below:

Which of the following is not divisible by 4?
Options:
(A) 10236
(B) 21792
(C) 47816
(D) 91232
(E) 72034
Answer and stream of consciousness:
(E)
Stream of consciousness: Divisibility rule of 4: Last two digits of the number should be divisible by 4
Option A: 10236, last two digits = 36. Divisible by 4
Option B: 21792, last two digits = 92. Divisible by 4
Option C: 47816, last two digits = 16. Divisible by 4
Option D: 91232, last two digits = 32. Divisible by 4
Option E: 72034, last two digits = 34. Not divisible by 4. Hence 72034 is not divisible by 4