I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Prove that twice of ten is the same as twice of eleven.

Which alphabet letter is a question?

What is red and smells like blue paint?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Solve below rebus puzzle?

Solve the following series:
AZ, GT, MN, __, YB

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?