5 + 10 + 15 + 20 + ... + 200 = ?
Show answer & explanation
Correct answer: C
Explanation
Given:
5 + 10 + 15 + … + 200
According to the formula:
Sum = n/2 × (First term + Last term)
n = 200/5 = 40
Sum = 40/2 × (5 + 200)
= 20 × 205
= 4100
SSC MTS - 17 Feb 2026 - Shift 1 • Quantitative Aptitude • Q12
5 + 10 + 15 + 20 + ... + 200 = ?
Correct answer: C
Explanation
Given:
5 + 10 + 15 + … + 200
According to the formula:
Sum = n/2 × (First term + Last term)
n = 200/5 = 40
Sum = 40/2 × (5 + 200)
= 20 × 205
= 4100