What happened when the wheel was invented?

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

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

What goes up but never comes down?

What is at the end of a rainbow?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?