Rationale: (25/100) * 40 – (4/5) * 25
10 - 20 = 10
The answer: (A)
Question: How much is 25% of 40 is greater than 4/5 of 25?
Options:
(A) 10
(B) 776
(C) 66
(D) 12
(E) 99

Reasoning: 1 man's 1 day work = 1/100
(10 men + 15 women)'s 1 day work = 1/5
15 women's 1 day work = (1/5 - 10/100) = 1/10
1 woman's 1 day work = 1/150
1 woman alone can complete the work in 150 days.
Ans: (B)
Question: 10 men and 15 women together can complete a work in 5 days. It takes 100 days for one man alone to complete the same work. How many days will be required for one woman alone to complete the same work?
Options:
(A) 127 days
(B) 150 days
(C) 177 days
(D) 187 days
(E) 225 days

Rationale: Speed = 45 * 5/18 = 25/2 m/sec
Total distance covered = 510 + 140 = 650 m
Required time = 650 * 2/25 = 52 sec
The answer: (B)
Question: A train 510 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Options:
(A) 40
(B) 52
(C) 26
(D) 21
(E) 14

Reasoning: 6C2 * 3C3 * 4C3 = 15*1*4 = 60.
Ans: (C)
Question: An analyst will recommend a combination of 2 industrial stocks, 3 transportation stocks, and 3 utility stocks. If the analyst can choose from 6 industrial stocks, 3 transportation stocks, and 4 utility stocks, how many different combinations of 9 stocks are possible?
Options:
(A) 12
(B) 19
(C) 60
(D) 180
(E) 720

Rationale: Number of ways = 4!/2! = 4X3X2X1/2X1 = 12
The answer: (A)
Question: In how many different ways can the letters of the word â€˜EVERâ€™ be arranged?
Options:
(A) 12
(B) 280
(C) 300
(D) 310
(E) 360

Rationale: Mentally imagine this number as (10 + 2 ) ×× 19 = 190 + 38 = 228.
The answer: (B)

Question: Find 12 ×× 19
Options:
(A) 238
(B) 228
(C) 208
(D) 277
(E) 101