What number should come in place of the question mark below?

The Little ant seems to be always confused. Do you know why?

People put me on the table and cut me but do not eat me. What am I?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

I am an odd number. Take away a letter and I become even. What number am I?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Take one out and scratch my head, I am now black but once was red. What am I?

Make a sentence consisting of three words that have the whole alphabet.

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?