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Number Series - Verbal and Reasoning

Directions to SolveIn each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much
Q1:

Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

A 20

B 25

C 30

D 50

ANS:A - 20

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.