There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Can you name four days which start with the letter 'T'?

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

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

The more you take me, the more you leave me behind.
Who Am I?

Decode below rebus
D
N
A
T
S , D

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What is the largest number you can write with just 3 digits?