Question 36

Select the number that can replace the question mark (?) in the following series.
2807, 1400, 697, ? , 171, 84

Solution

$$84\times2+3$$ = 168+3 = 171

$$171\times2+4$$ = 342+4 = 346

$$346\times2+5$$ = 692+5 = 697

$$697\times2+6$$ = 1394+6 = 1400

$$1400\times2+7$$ = 2800+7 = 2807

So here 346 will come in place of the question.

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Select the number that can replace the question mark (?) in the following series.2807, 1400, 697, ? , 171, 84