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?

What does this Rebus Picture means ?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Through your logical capabilities, can you make 7 an even?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

I can write cow in 13 letters.

Can You?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

In which direction should the missing arrow point?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?