What has lots of eyes, but can’t see?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What is the end of everything?

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 ?

When it is alive we sing, when it is dead we clap our hands. What is it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?