how many 0s are there in end of product of 1st 100 multples of10??????????????pls EXPLAIN!!!!

hey shivam

for first 100 multiples of 10 you have to check how many 2 ,3 and 4 digit number comes 

thus , for 2 digit multiples i.e. 10.20,30,40,50,60,70,80,90 = 9 

 similarly for 3 digits = 81  + (2x9) = 99 (because hundreds have 2 zeroes)

 and a 4 digit number = 1 which is 1000(last number)

Thus ,taking them all for the zeroes  you can calculate now = 9 + 99 + 3 = 111..Answer