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Find out the number of zeroes at the end of 1002 × 1001 × 1000 × ........3 × 2 × 1.
1. 149
2. 229
3. 249
4. 269

1 Answer

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Correct Answer - Option 3 : 249

Given:

1002 × 1001 × 1000 × ........3 × 2 × 1

Concept Used:

No. of zeroes = Sum of all quotient

Calculation:

1002 × 1001 × 1000 × ........3 × 2 × 1

⇒ 1002!

Divide divisor by 5 and add the respective quotient

1002 ÷ 5 = 200

200 ÷ 5 = 40

40 ÷ 5 = 8

8 ÷ 5 = 1

Adding the respective quotients 

200 + 40 + 8 + 1 = 249

∴ No. of zeroes in the end is 249.

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