Answer: (E)
Question: Rajani has to read a book of 445 pages. She has already read the first 157 pages of the book and if she reads 24 pages of the book everyday then how long will she take now to complete the book?
Options:
(A) 25 days
(B) 20 days
(C) 46 days
(D) 21 days
(E) None of these
[CoT]: [Remaining pages to read = 445 157 = 288
Reqd. number of days = 28824 = 12]

Answer: (B)
Question: If c and d are unique prime integers, which of the following must be even?
Options:
(A) cd
(B) 2c2d
(C) c2d
(D) 2cd
(E) cd^2
[CoT]: [Any number multiplied by 2 has to be an even number]

Answer: (A)
Question: Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?
Options:
(A) 17 1/7 days
(B) 17 1/8 days
(C) 17 5/7 days
(D) 17 3/7 days
(E) 13 1/7 days
[CoT]: [1/30 + 1/40 = 7/120
120/7 = 17 1/7 days]

Answer: (A)
Question:
Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
Options:
(A) 20
(B) 23
(C) 25
(D) 30
(E) 35
[CoT]: [This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.]