What has many keys but can’t open a single lock?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What has one letter and starts with an E?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What word is pronounced the same if you take away four of its five letters?

Can you place six X (crosses) in below board without making three in a row in any way ?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair