John likes 400 but not 300; he likes 100 but not 99; he likes 2500 but not 2400. Which does he like?

A. 400
B. 900
C. 2400

I guess he doesn't like any  

You are wrong. he likes 2400. The answer is C.

I'm sorry I just guess.Give me next  questions.

Try this one and feel yourself in 2% of the cleverest men in the world.

http://www.amazeingart.com/fun/einstein-quiz.html

I think it's a bit difficult for you because it's in english, I'm sure that you can easily solve it if it's in your native language. Anyways, I want to give you the easiest one. No doubt you can solve it.

  1000
+    30
+1000
+    40
+1000
+    20
+1000
+    10
--------
    ?

Registan that's really easy
1000
+    30
+1000
+    40
+1000
+    20
+1000
+    10
--------
1100

I hope 

You are wrong, try again.

Registan,

how about 4100?
There are 4x1000 and 30+40+20+10=100 ----- 4000+100=4100
Or
1000+30=1030,
1030+1000=2030,
2030+40=2070,
2070+1000=3070,
3070+20=3090,
3090+1000=4090,
4090+10=4100

So total is 4100, isn't it?

i tried, i wasn't that good at mathematics so if I'm wrong sorry....


The Alchemist

Yes it's the right answer.