Question 46

Find the pair of numbers that can replace the question mark (?) in the series given below :90, 180, 12, 50, 100, ?, ?, 3, 50, 4, 25, 2, 6, 30, 3.

Solution

In this series -
The first term is the product of the last and the second last term.
The second term is the product of the second last and third last terms.
The third term is the product of the third last term and the fourth last term.

90 = 3 * 30
180 = 30 * 6
12 = 6 * 2
50 = 2 * 25
100 = 25 * 4
? = 4 * 50 = 200
? = 50 * 3 = 150

Thus, the pair of numbers will be 200, 150.

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