In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

If six children and two dogs were under an umbrella, how come none of them got wet?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Which is the smallest number that you can write using all the vowels exactly once?