You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

How many triangles can you find in this given picture?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

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?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What can you hold in your right hand, but never in your left hand?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

How many words can a pen with half refill write?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M