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 riddle mean?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

You bought me for dinner but never eat me. What am I?

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

Rearrange the letters in "new door" to make one word.

Can you find the company name in the pictogram below?

Different lights make me strange by changing me into different sizes. What am I?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?