Is the number eleven thousand , eleven hundred and eleven is divisible by $3$.

Ritika made notes on loose pages  of the social science note book for self study. when she numbered the pages , she wrote $121$ in all.

a. How many pages are there in her notes.

Ritika made notes on loose pages  of the social science note book for self study. when she numbered the pages , she wrote $121$ in all.

b. How many times does the number $9$ appears in the page number ?

Write T or F.

If a  number is divisible by $2 \mathrm{and} 5$ then it is divisible by $10$ as well.

Write T or F.

If a number ends with $3$, then it is divisible by $3$.

Write T or F.

If the sum of digits of a number is divisible by $2$, then the number is divisible by $2$.

Write T or F.

$515$ is divisible by $5$, but not by $10$.