Ques: Find the odd man out
253, 136, 352, 324, 631, 244
Options:
(A) 324
(B) 136
(C) 352
(D) 631
(E) 531
Ans: (A)
CoT: The sum all three digits comes to 10 except 324

Ques: If the cost price of 50 articles is equal to the selling price of 15 articles, then the gain or loss percent is?
Options:
(A) 16
(B) 127
(C) 12
(D) 18
(E) 233
Ans: (E)
CoT: Percentage of profit = 35/15 * 100 = 233%

Ques: The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?
Options:
(A) 22
(B) 75
(C) 44
(D) 28
(E) 12
Ans: (B)
CoT: S = (90 + 60)/2 = 75 kmph

Ques: Which one of the following is a prime number?
Options:
(A) 10
(B) 61
(C) 49
(D) 75
(E) 91
Ans: (B)
CoT: 61 is divisible by 1, and itself. So, it is a prime number.