Can you place three balls such that the equation shown in the picture holds true?

Can you replace the question mark with the correct number?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

What question can you never answer yes to?

Out of four images which one is the odd one out?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What does below pictogram mean?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?