What begins with T, ends with T, and has T in it?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Where do fish keep their money?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?