Instructions

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

Question 63

? , 15 , 75 , 525, 4725, 51975

Solution

Odd natural numbers starting from 3 are multiplied

5 $$\times 3$$ = 15

15 $$\times 5$$ = 75

75 $$\times 7$$ = 525

525 $$\times 9$$ = 4725

4725 $$\times 11$$ = 51975

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