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.

Decode below three cipher riddles:

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

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?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

You need to arrange three 7 and mathematical symbols to form number 1?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

Find the next number in the series below

21 32 54 87 131 ?