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?

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

Count the squares in the matchstick puzzle below?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Which English verb becomes past tense just by rearranging the letters?

Which number should replace the question mark?

I have branches, but no fruit, trunk or leaves. What am I?

Can you make four (4) nines (9) equal 100?

I cannot talk, but I always reply when spoken to. What am I?