I am quite hot but become too cold if you remove the first two letters. What am I?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

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.

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find the next number in the series.
1 10 24 43 67 ?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

In which direction should the missing arrow point?

Why is Saturday stronger than Monday?

Identify the 10 differences between the two given pictures.