What is the next number in the series?
1, 3, 9, 27, __
Show answer & explanation
Correct answer: C
Explanation
1, 3, 9, 27, ?
1 × 3 = 3
3 × 3 = 9
9 × 3 = 27
Each time the number is multiplied by 3.
Now the next number:
27 × 3 = 81
Correct answer: 81
SSC CGL - 26 Sep 2025 - Shift 3 • Reasoning • Q16
What is the next number in the series?
1, 3, 9, 27, __
Correct answer: C
Explanation
1, 3, 9, 27, ?
1 × 3 = 3
3 × 3 = 9
9 × 3 = 27
Each time the number is multiplied by 3.
Now the next number:
27 × 3 = 81
Correct answer: 81