Which number will replace the question mark (?) in the following series? 3, 4, 5, 6, 9, 10, 11, 12, 15, ? Option 1: 16 Option 2: 17 Option 3: 18 Option 4: 14

Answer: 16. Solution: Looking at the series: 3, 4, 5, 6, 9, 10, 11, 12, 15, ? The series can be broken into groups of consecutive numbers: Group 1: 3, 4, 5, 6 Group 2: 9, 10, 11, 12 Group 3: 15, ?, ?, ? Each group contains 4 consecutive integers. The starting number of each group follows a pattern: - First group starts at 3 - Second group starts at 9 (difference of 6) - Third group starts at 15 (difference of 6) Following the pattern, the third group should be: 15, 16, 17, 18 Therefore, the number that replaces the question mark is 16. The answer is Option 1: 16

Logical Reasoning

Sequence & Series

Easy

Which number will replace the question mark (?) in the following series?

3, 4, 5, 6, 9, 10, 11, 12, 15, ?

✅ Correct Option: 1

Looking at the series: 3, 4, 5, 6, 9, 10, 11, 12, 15, ?

The series can be broken into groups of consecutive numbers:

Group 1: 3, 4, 5, 6

Group 2: 9, 10, 11, 12

Group 3: 15, ?, ?, ?

Each group contains 4 consecutive integers.

The starting number of each group follows a pattern:

First group starts at 3
Second group starts at 9 (difference of 6)
Third group starts at 15 (difference of 6)

Following the pattern, the third group should be: 15, 16, 17, 18

Therefore, the number that replaces the question mark is 16.

The answer is Option 1: 16

2025: 22 May Shift 1

Select the term that will come next in the following series.

FBA, IGE, LLI, OQM, ?

2024

What should come in the place of the question mark (?) in the following alphanumeric series ? A1X, B4P, E25J, J100F, ?

2022: 17 Aug Shift 1

Arrange the given words in the sequence in which they occur in the dictionary.

a. Firmament

b. Finish

c. First

d. Fissure

e. Fiscal

Choose the correct answer from the options given below

2022: 20 Aug Shift 1

Complete the series :

10.5, 7.5, ...?..., 3.0, 1.5, 0.5

2026: 19 May Shift 1

Study the given pattern carefully and select the option that can replace the question mark (?).

3	7	6
8	16	14
18	?	30

2025: 19 May Shift 2

How many 4s are there in the following number sequence which are immediately preceded by 6 and immediately followed by 5?

4 6 5 9 4 6 4 5 1 3 5 4 6 2 3 1 6 4 5 8 9

Which number will replace the question mark (?) in the following series? 3, 4, 5, 6, 9, 10, 11, 12, 15, ?

Solution

Related questions:

Keyboard Shortcuts

CUET General Test Past Year Questions (Topic-Wise)

Which number will replace the question mark (?) in the following series?

3, 4, 5, 6, 9, 10, 11, 12, 15, ?