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SSC MTS 2026 PYQ — Question 19

SSC MTS - 12 Feb 2026 - Shift 1 • Quantitative Aptitude • Q19

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The average of 10 consecutive natural numbers is (35/2). These numbers are in ascending order. What is the average of the last three numbers?

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Correct answer: A

Explanation

Given:

Number of terms = 10

Average = 35/2

According to the formula:

Average = (First term + Last term) / 2

First term + Last term = 35

Let the first term be 'a'

Then, the last term = a + 9

a + (a + 9) = 35

2a + 9 = 35

2a = 26

a = 13

The numbers range from 13 to 22

The last three terms = 20, 21, 22

Average = (20 + 21 + 22) / 3 = 63 / 3 = 21