How can you make number one disappear by adding something to it?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

No matter how little or how much you use me, you change me every month. What am I?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

When can we add 2 to 11 and get 1 as the correct answer?

If you say my name, I will no longer exist. What am I?

A father's child, a mother's child, yet no one's son.

Who am I?

Look at the picture and find out which square is not linked with any of the other squares.