What is full of holes but still holds water?

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?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Can you find the 09 errors in the picture below?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?