Question

the number 1,2,3,4,.......1000 are multiplied together. The number of zeros at the end of the product must be ?​

Answer 1

Answer:

249

Step-by-step explanation:

to find no of zeroes at the end of product we need to find no of 5 and no of 2 present when we factorise all the nos. as every2*5 will give one 0 at the end of result.

to find no of 5

1000/5=200

1000/5^2=40

1000/5^3=8

1000/5^4=1.6

so no of 5s available till 1000 is 200+40+8+1=249

as no of 2s are far more than 5 we need not count them.