What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

You bought me for dinner but never eat me. What am I?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

If 21x = 79x, what is the value of x?

What can go through glass without breaking it?