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

Where do you go to learn how to make ice cream?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

What's the only room from which no one can enter or leave

Count the number of lines in the image below ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have branches, but no fruit, trunk or leaves. What am I?