Number of fundamental units are present in the SI system of units are .

Fill in the right word to establish the correct relation. 

Electric current: ampere:: amount of substance: _____

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

The degree measure of $1$ radian (take$\pi =\frac{22}{7}$) is?

If $\angle \mathrm{A}=75°$ then the value of angle $\mathrm{A}$ in radians is: