10+10 and 11+11 can give you the same answer.

Explain how?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What has one eye, but can’t see?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

What is the longest word in the dictionary?