I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What am I?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

If eleven plus two equals one, what does nine plus five equal?