1) A boy multiplies 987 by a certain number and obtains 559981 as his answer. If in the answer, both 9's are wrong but the other digits are correct, then the correct answer will be : A) 553681 B) 555181 C) 555681 D) 556581 Answer: Option CExplanation:987 = 3 * 7 * 47. So, required number must be divisible by each one of 3, 7, 47. None of the numbers in (a) and (b) arc divisible by 3, while (d) is not divisible by 7. Correct answer is (c).
