Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Replace the question mark with the correct number in the below-given picture?

Using Only Five 5's and any mathematical operator make sum as 37

How can one talk without saying a single word?

who is silent in the parliament?

In the formation, you can see a few arranged matchsticks. Can you form three squares by moving just three matchsticks?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?