Consider two positive two-digit integers P and Q that consist of the same digits but in reverse order. Which of the following sums cannot be achieved by adding P and Q?

Correct answer marked below

172

Correct

154

110

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Official Explanation

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Let the first digit be a and the second digit be b. Then, the two-digit numbers can be expressed as follows: P = 10a + b and Q = 10b + a. The sum of…

Comments

PrakharApr 28, 2025

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AsadMay 31, 2024

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What this question tests

Your fluency with the order of operations, fractions, decimals, and basic number sense — the foundation every quant question leans on.

Applying the order of operations out of sequence or rounding intermediate values before the final step.