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The sum of two numbers is 18 The greatest product of...

This question belongs to Arithmetic Ability Number System
Number System
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The sum of two numbers is 18. The greatest product of these two number can be:

Answer & Solution
Correct Answer: Option B
a + b = 18
So, maximum of (a × b) will be only when a = b
Thus, a = b = 9
Maximum of (a × b) = 9 × 9 = 81.
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