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?

I look at you, you look at me I raise my right, you raise your left. What am I?

I am sure no one can have two things for dinner. what are they?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What is the largest number you can write with just 3 digits?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

What does does this rebus picture means ?

What is the word or phrase?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

I am the fastest animal but cannot climb the tree. What am I?