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

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you find the company name in the pictogram below?

What is the centre of gravity?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

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

What number comes next in the series?

5 15 5 18 5 24 14 20 _

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?