Look at the series: 80, 10, 70, 15, 60, __________. What number should come next?
Question and options
Look at the series: 80, 10, 70, 15, 60, __________. What number should come next?
- 20
- 25
- 30
- 50
Answer and explanation
Correct answer: A - 20
Two interleaved series: 80, 70, 60 (decreasing by 10) and 10, 15, ? (increasing by 5). The next term belongs to the second series: 15 + 5 = 20.
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CUSAT CAT Integrated IPR Ph.D.
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