Number series: constant difference (arithmetic series)

This type of question, asked 5 times: 19 Jul 2023 S3, 21 Jul 2023 S1, 24 Jul 2023 S1, 23 Sep 2025 S3, 24 Sep 2025 S3. All 5 questions below, oldest first.

Try each one first, then open its answer.

Question 1
19 Jul 2023 S3
19 $Which of the following numbers will replace the question mark (?) in the given series? 27, ?, 101, 138, 175, 212, 249$
Tap an option to check your answer.
Question 2
21 Jul 2023 S1
23 $Which of the following numbers will replace the question mark (?) in the given series? 245, 212, ?, 146, 113, 80$
Tap an option to check your answer.
Question 3
24 Jul 2023 S1
20 $Which number should replace the question mark (?) in the following number series? 642, 598, 554, ?, 466, 422$
Tap an option to check your answer.
Question 4
23 Sep 2025 S3
15 $What should come at the place of question mark? : 101, 94, 87, 80, 73, ?$
Tap an option to check your answer.
Question 5
24 Sep 2025 S3
4 $Find the missing number. 24, 35, 46, 57, ?, 79$
Tap an option to check your answer.

Number series: constant difference (arithmetic series)

Question 1

Question 2

Question 3

Question 4

Question 5