Number series:Look at this series 80, 10, 70, 15, 60. What number should come next?
Correct answer: A. 20
- A. 20
- B. 25
- C. 30
- D. 50
Explanation
Look at the series carefully! 80, 10, 70, 15, 60. If you ignore 10 in between, you will realize, 10 is deducted from 80 and so the 3rd number is 70. Then again skip 15, and again 10 is deducted from 70 and so the 5th number is 60. This means that the 10 deducts on each odd number(1st, 3rd, 5th). Similarly, the 2nd number is 10, and the 4th is 15. We can say in each even number, we are adding a 5. so 10, 15th and 6th number will be 20.Therefore, A= 20 will be the answer.
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
Series Completion. If CD:EF= 33, Gl:HK=66 then LM:NO=?
Complete the series: Which letter comes before "G" and after "E"?
Number series:Choose which one is the different number from the following
Series completionIf the value of B= 16 E=64, K=256, then O=?
Complete the series. Which letter lies in the middle of the word quality"?
Complete the series. Discernible and Palpable have _ numbers of the same letter.