Find the number that is midway between the lowest and the highest number in the grid. Which number is midway between that number and the number nearest to the highest number?
Add the sum of the odd numbers in square A to the sum of the even numbers in square B, then subtract the sum of the prime numbers in square C. What is the result?
At a demonstration, protesters outnumbered the police by 8 to 1. 84 arrests were made, averaging 3 for every 2 policemen. How many protesters were there?
A card player holds 13 cards of four suits, of which seven are black and six are red. There are twice as many hearts as clubs and twice as many diamonds as hearts. How many spades does he hold?
Multiply the numbers that are midway between the lowest and highest numbers in A and in B, then subtract the number midway between the lowest and highest numbers in C. What is the result?
The opposite faces of a die add up to 7. Each of the three dice rotates in the direction shown by its arrow, one face (a quarter turn) at a time. After three moves, what is the total of the three front faces?
At the casino I had to pay a £1 entrance fee each day. I also gave the cloakroom girl a £1 tip each evening. Each day for four days I lost half of the money I had left. I went home with £1. How many pounds (£) did I have to start with?