The last digit of $5^n$ is . . . . . . ,where $n \in N$.

Consider the numbers $4^{n}$,where $n$ is a natural number. Check whether there is any value of $n$ for which $4^{n}$ ends with the digit zero.

Without actually performing the long division,state whether the following rational number will have a terminating decimal expansion or a non-terminating repeating decimal expansion: $\frac{13}{3125}$.

Express $7429$ as a product of primes.

Find the square root of $24+2 \sqrt{119}$.

The product of two consecutive positive integers is divisible by $2$.