If Rajina's daughter is my daughter's mom, who am I to Rajina?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Which point will the car reach to go out?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Which digit occurred maximum times between the number 1 and 1000?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?