(Ans). (E)
(Question). Some persons can do a piece of work in 32 days. Two times the number of these people will do half of that work in?
Options:
(A) 3
(B) 4
(C) 5
(D) 6
(E) 8
(CoT). 32/ (2 * 2) = 8 days

(Ans). (C)
(Question). If 15% of 40 is greater than 25% of a number by 2,then find the number is?
Options:
(A) 20
(B) 15
(C) 16
(D) 25
(E) 30
(CoT). 15/100 * 40 - 25/100 * x = 2 or x/4 = 4 so x = 16

(Ans). (B)
(Question). A can do a piece of work in 20 days. B in 15 days A and C in 12 days. In how many days can A finish the work if he is assisted by B on one day and C on the next, alternately?
Options:
(A) 2 days
(B) 8 days
(C) 6 days
(D) 8 days
(E) 9 days
(CoT). A + B = 1/20 + 1/15 = 7/60
A + C = 1/20 + 1/12 = 8/60
7/60 + 8/60 = 15/60 = 1/4
4 days * 2 = 8 days

(Ans). (C)
(Question).
The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 23. What is the middle number?
Options:
(A) 25
(B) 27
(C) 15
(D) 32
(E) 34
(CoT). The total of seven numbers = 7X18 = 126
The total of first 3 and last 3 numbers is = 3 X 14+3 X 23 = 111
So, the middle number is (126 - 111 ) = 15