Maths Puzzles please

[Platypus]

I got a green hammer

Weirdo !

I got a red hammer

[Cliphead]

Weirdo !

I got a red hammer

I've got an abnormal mind

I knew that anyway

[realityhack]

Blue Spanner.

Wonder why most would answer red hammer?

[TimberWolf]

Give him this to think about.

When his age equals your birth year, your age will be his birth year (excluding century's).

E.g. If you were born in 1970 and he in 1995, when he's 70, you'll be 95.

[NotAllThere]

2 + 2 = always 4.:

Not in modular arithmetic. In Mod 3, 2 + 2 = 1, and in Mod 4, 2 + 2 = 0.

You just thought about a red hammer , didn't you?
...
98% of the folks would answer a red hammer while doing this exercise.

I thought of a red spade. 98% of people are sheep. meh!

Ok, here's one.

Think of a number.












Double it.














Add 4
















Divide by 2.














Multiply by 3.

















Add all the digits in the number together.

















Divide by three.


















Close your eyes.


















Dark, isn't it.

[Platypus]

Ok, here's one.

Think of a number...Dark, isn't it.

LOL - Keep 'em coming

[chef]

Blue Spanner.

Wonder why most would answer red hammer?

red spade

[ControlG]

My young daughter loves to get people to do this one

Think of a number

Double it

Add X (where X is even and magnitude can depend on person doing it)

Half it

Take away number you first thought of

answer is X/2

You can even show a slightly older child the algebra to explain it and because they are interested they usually understand it

[Scary]

Blue monkey wrench...

[Advocate]

I got red EO...