Instructions

What will come in place of question mark (?) in the given number series ?

Question 34

142 70 34 16 ? 2.5

Solution

Each number is divided by 2 and then 1 is subtracted

142 $$\div 2 - 1$$ = 70

70 $$\div 2 - 1$$ = 34

34 $$\div 2 - 1$$ = 16

16 $$\div 2 - 1$$ = 7

7 $$\div 2 - 1$$ = 2.5

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