All mock tests are FREE till 31 December — register to save your progress
Unit 5 · Mathematical Reasoning and Aptitude Paper 1 · 21 October 2022 Morning

Find the missing term in the series given below.
2, 1, 4, 3, 6, 5, 8, ?
नीचे दी गई श्रृंखला में लुप्त पद को ज्ञात कीजिए।
2, 1, 4, 3, 6, 5, 8, ?

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: D. 7

Explanation

The series alternates −1 and +3: 2 → 1 → 4 → 3 → 6 → 5 → 8 → 7. (Equivalently, the odd positions are 2, 4, 6, 8 and the even positions are 1, 3, 5, 7.) Missing term = 7.श्रृंखला में बारी-बारी से −1 और +3 होता है: 2 → 1 → 4 → 3 → 6 → 5 → 8 → 7। (विषम स्थान 2, 4, 6, 8 और सम स्थान 1, 3, 5, 7 हैं।) लुप्त पद = 7।

More Mathematical Reasoning and Aptitude questions