SBI Clerk 22 May 2016

Instructions

What should come in place of question mark (?) in the following number series ?

Question 32

22, 19.7, 24.3, 17.4, ?, 15.1

Solution

Multiples of 2.3 are added and subtracted alternatively

22 $$- 2.3 \times 1$$ = 19.7

19.7 $$+ 2.3 \times 2$$ = 24.3

24.3 $$- 2.3 \times 3$$ = 17.4

17.4 $$+ 2.3 \times 4$$ = 26.6

26.6 $$- 2.3 \times 5$$ = 15.1

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