The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

What begins with T, ends with T, and has T in it?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Which is the smallest number that you can write using all the vowels exactly once?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.