Asked in Premeth Test 18 — Alkyl Halides, Aldehydes and Ketones, Atomic Structure (20 March 2025) 2025

Directions: In the following question, a number sequence is given with one term missing. Choose the correct term that will continue the same pattern and replace the question mark in the given sequence.3,10,33,104,?

Correct answer: C. 319

  • A. 310
  • B. 312
  • C. 319
  • D. 315

Explanation

To solve the sequence, we first find the differences between consecutive terms:10 - 3 = 733 - 10 = 23104 - 33 = 71These differences are 7, 23, and 71. Next, we examine the differences between these differences:23 - 7 = 1671 - 23 = 48The differences between differences are 16 and 48, which increase by a factor of 3. Continuing this pattern, we multiply 48 by 3:48 × 3 = 144Adding 144 to the last difference (71):71 + 144 = 215Finally, adding this new difference (215) to the last term in the sequence (104):104 + 215 = 319Thus, the correct answer is 319.Other options are incorrect as they either miscalculate the pattern or the final addition.

Written and checked by , MS Computer ScienceLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? [email protected]

About Letter, Symbol and Number Series

Series questions use numbers, letters, symbols or combinations arranged according to a hidden pattern. You may need to identify repeated operations, alternating rules, alphabetical positions, differences, reversals and mixed sequences to find a missing term or predict the next one.

Practise Letter, Symbol and Number Series

299 free Letter, Symbol and Number Series MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Analytical and Logical Reasoning questions like this

Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

More Letter, Symbol and Number Series questions