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Qus: Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
Qusइस श्रृंखला को देखें: 80, 10, 70, 15, 60, ... आगे कौन सी संख्या आनी चाहिए?
A. 20
B. 25
C. 30
D. 50
Solution
A. 20
Explanation
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.
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