What always comes into a house through the keyhole?

Can you find out the number that should replace the question mark with a valid reason?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What is next number in the pattern below:

131 517 192 123 ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What kind of band never plays music?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

10+10 and 11+11 can give you the same answer.

Explain how?

The cream is heavier than Milk. True or False?