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

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What has many teeth, but cannot bite?

You can see it everyday, But cannot touch it at will. What is it?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?