Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Question:

A and B are two numbers such that A > B and their LCM is 209.  The value of A2 - B2 is:

Options:

120

240

360

540

Correct Answer:

240

Explanation:

A × B = 209 = 11 × 19 (only values that satisfy the condition)

Therefore,

A2 - B2 = (19)2 - (11)2

            = 361 - 121 = 240