A number is divisible by $15$. By what other numbers will that number be divisible? 

Write the prime factors of $1386$ in exponential form.

Find the digit which should replace $*$ in $23125*$ to make it divisible by $11$.

Among $57, 212, 117, 97, 315, 931$, identify the even numbers.

Among $57, 212, 117, 97, 315, 931$, identify the odd numbers.

Among $57, 212, 117, 97, 315, 931$, identify the prime numbers.

Among $57, 212, 117, 97, 315, 931$, identify the composite numbers.

Find whether $149$ is a prime number or not.

Find whether $197$ is a prime number or not.