Factors and Multiples

A boy saves Rs. $5$ per day. In how many days (least number) he would be able to save money in multiples of $100$?

What is the number $6$ less than $8$^th multiple of $13$?

Find a number $12$ more than the product of smallest prime number and largest prime number less than $30$?

Determine the number which when divided by $7,14,21,35$ leaves remainder  $5$.

What is the largest number less than $110$ divisible by $3$?

What is the smallest 3-digit prime number?

What is the smallest number which when divided by $6$ and $8$ leaves remainder $5$?

What is the smallest number which when divided by $7$ and $5$ leaves remainder $4?$

Find the value of $a$ and $b$?

What is the value of $a$?

Seven added to $11$^th multiple of $11$ is:

What is $2$ more than $11$^th multiple of $9$?