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APTITUDE

Aptitude solved Problems – 92
1. If 17 toys cost Rs. 340, what do 40 toys cost?
A. Rs. 850
B. Rs. 800
C. Rs. 810
D. Rs. 820
E. Rs. 830

Answer : B. Rs. 800
Explanation :
Let required cost be Rs. X
More toys, More cost ( Direct Proportion )
17 : 40 : : 340 : x
⇒ 17 * x = 40 * 340
17x = 13600
x = 13600 / 17
= 800
∴ The required cost = Rs. 8002. Find a number such that when 14 is subtracted from 7 times the number, the result is 21 more than twice the number.
A. 8
B. 7
C. 9
D. 6
E. 5

Answer : B. 7
Explanation :
Let the number be x
7x – 14 = 2x + 21
7x – 2x = 21 + 14
5x = 35
x = 35 / 5
x = 7
∴ The required number = 7

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