Find the number of squares in the below picture

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

How many letters are in the alphabet?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What do you answer even though it never asks you questions?

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.

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

A word I know has six letters it contains, remove one letter and 12 remain. What is it?