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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Give it food and it will live; give it water and it will die.

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What does this below rebus puzzle mean?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Solve this riddle by finding the odd one out from the rest.

What does this mathematical rebus means ?

Spot what is wrong here in below Picture?