Instructions

In each of the following questions, select the missing number from the given responses.

Question 184

15 225 30
7 70 20
3 ? 8

Solution

Given,

15 225 30
7 70 20
3 x 8
The middle term is equal to (1st term * half of last term).
Hence, x = $$3\times(8\div2)$$
= 12

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