Rationale: (1+2+3)^2 = 36
(2+2+1)^2 = 25
The answer: (D)
Question: 123 : 36 : : 221 : ?
Options:
(A) 52
(B) 69
(C) 72
(D) 25
(E) 32

Rationale: Required sum = (31 + 37 + 41 + 43 + 47) = 199
Note: 1 is not a prime number
The answer: (B)
Question: What is the sum of all the prime numbers greater than 30 but less than 50?
Options:
(A) 126
(B) 199
(C) 198
(D) 188
(E) 122

Rationale: D = 110 + 390 = 500 m
S = 60 * 5/18 = 50/3
T = 500 * 3/50 = 30 sec
The answer: (D)
Question: How long does a train 110 m long traveling at 60 kmph takes to cross a bridge of 390 m in length?
Options:
(A) 18.9 sec
(B) 88.9 sec
(C) 22.9 sec
(D) 30.00 sec
(E) 72.0 sec