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?

What number do you get when you multiply all of the numbers on a telephone's number pad?

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

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

What does this mathematical rebus means ?

I purchased an awesome ice cream cone having 5 different flavour scoops.
Five flavours are pistachio, mint-chip, strawberry, marshmallow, and raspberry

I will give u some clues so that you can figure out the order of flavours from bottom to top.
1. The bottom flavour of the cone has 10 letters.
2. The marshmallow scoop is between the pistachio and the mint-chip scoop.
3. marshmallow is the raspberry scoop but below the mint-chip scoop.

So can you figure out the flavour of ice cream in order from bottom to top?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

What do you think with the below Picture ?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?