Instructions

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

Question 175

250000 62500 12500 3125 625 ? 31.25

Solution

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Clearly ,

$$\frac{250000}{4}$$ = 62500

$$\frac{62500}{5}$$ = 12500

$$\frac{12500}{4}$$ = 3125

$$\frac{3125}{5}$$ = 625

Hence ,

$$\frac{625}{4}$$= 156.25

$$\frac{156.25}{5}$$ = 31.25

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