Question 50

Which number will replace the question mark (?) in the following series?
28, 32, 48, 84, ?

Solution

$$28+2^2\ =\ 28+4\ =\ 32$$

$$32+4^2\ =\ 32+16\ =\ 48$$

$$48+6^2\ =\ 48+36\ =\ 84$$

$$84+8^2\ =\ 84+64\ =\ 148$$

Here 148 will come in place of the question mark.


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