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Question

Q1. What is the least integer which when subtracted from both the numerator and denominator of 60/70 will give a ratio equal to 16/21 ?

28

35

30

24

Accepted Answer

Answer : 28

Let x be the required integer.
Then,
(60-x)/(70-x) = 16/21
⇒ 1260 - 21x = 1120 - 16x
⇒ 5x = 140
⇒ x = 28.
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