Logical Reasoning

Sequence & Series

Medium

Find the wrong number in given series:

89, 78, 86, 80, 85, 82, 83

✅ Correct Option: 2

Differences alternate: $-11, +9, -7, +5, -3, +1$ . Starting from 89: $89-11=78$ , $78+9=87$ (given as 86, so wrong), $87-7=80$ , $80+5=85$ , $85-3=82$ , $82+1=83$ . The wrong number is 86 (should be 87).

2023: 15 June Shift 2

Find out the wrong number in the sequence:

40960, 10240, 2560, 640, 200, 40, 10

2023: 19 June Shift 1

17th term of the A.P. 13, 16, 19, 22, 25, . . . . is :

2022: 17 Aug Shift 1

Find the missing number from the following given option:

2025: 20 May Shift 2

Choose the option that shall come in place of the ? in the following series:

25WV52, 23TS32, 21QP12, ?, 17KJ71

2026: 30 May Shift 2

Which of the following list of numbers is/are an Arithmetic Progression?

(A) -2, 2, -2, 2, -2, ...

(B) 1, -1, -3, -5, ...

(D) 20, 17, 14, 11, ...

Choose the correct answer from the options given below:

2025: 22 May Shift 2

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

BE, DG, FK, HQ, ?

Find the wrong number in given series: 89, 78, 86, 80, 85, 82, 83

Solution

Related questions:

Keyboard Shortcuts

CUET General Test Past Year Questions (Topic-Wise)

Find the wrong number in given series:

89, 78, 86, 80, 85, 82, 83