Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What's a single-digit number with no value?

Which tank will fill first?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Spot the cat in the picture below

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

John was piloting a plane behind a car but was never able to overtake it. Why?

Why Aeroplane windows are round?