ABC26GN1695 · Problems on Numbers

Subject: General Aptitude · Chapter: Problems on Numbers · Exam: · Marks: · Difficulty:

Two numbers differ by 5. If their product is 336, then the sum of the two numbers is

(a)21

(b)28

(c)37

(d)51

Answer

Answer (as printed): C

Explanation

Let the numbers be x and y. Then, x – y = 5 and xy = 336. (x + y)2 = (x – y)2 + 4xy = 25 + 4 × 336 = 1369 ⇒ x+y = 1369 = 37.

Explanation as extracted from the printed page; notation may be imperfect.