Question

How many zeroes will ${19000}^2$ have at the end?

• A. 3
• B. 5
• C. 6
• D. 4

Answer 1

The correct option is C

6

$(19\times 1000{)}^2$
$=19\times 19\times 1000\times 1000$
$=19\times 19\times 1000000\Rightarrow$ 6 zeroes

Alternate:
If a number ends with 'n' zeroes, its square ends with '2n' zeroes.