How to do questions 7&8?

The sum of the coordinates of a point lying ...

How to solve question 3?

How to solve question 29?

If 100=x[mod7]then least possible value of x...

Which of these is surest test of electificat...

If r,s,t are prime numbers and p,q are the p...

Which noble gas is used in filling ballons f...

Relation between KE &n in Bohr atom mode...

A shooter can hit a given target with probab...

If a hydrogen atom is supplied with 15.8 eV ...