You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What makes this number unique: 8,549,176,320?

Through your logical capabilities, can you make 7 an even?

Identify the hidden meaning behind this picture?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

What runs around the whole yard without moving?

Solve the mathematical equation in the picture below.

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you find the 09 errors in the picture below?