How many zeroes will 190002 have at the end?
3
4
5
6
(19×1000)2 =19×19×1000×1000 =19×19×1000000⇒ 6 zeroes Alternate: If a number ends with 'n' zeroes, its square ends with '2n' zeroes.
A number has 4 zeroes at the end. How many zeroes will its square have?