47 is added to the product of 71 and an unknown number.

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47 is added to the product of 71 and an unknown number. The new number is divisible by 7 giving the quotient 98. The unknown number is a multiple of

1. 2
2. 5
3. 7
4. 3

Correct Option: D

Let the unknown number be p.
∴ 71 × p + 47 = 98 × 7
⇒ 71p = 686 – 47 = 639

⇒ p =	639	= 9 = 3 × 3
	71

Thus , The unknown number is a multiple of 3 .