Instructions

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

Question 124

721, 361, 181, 91, 46, ?

Solution

The pattern is :

721 $$- 360$$ = 361

361 $$ - \frac{360}{2} = 361 - 180$$ = 181

181 $$ - \frac{180}{2} = 181 - 90$$ = 91

91 $$ - \frac{90}{2} = 91 - 45$$ = 46

46 $$ - \frac{45}{2} = 46 - 22.5$$ = 23.5

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