Number puzzles
| 6) |
Answer: 2 Explanation: Reading the top and bottom lines as 2 digit numbers, multiply these together to give the 3 digit result, written in the middle. |
| 7) |
Answer: 9 Explanation: Starting with the top left square, and moving clockwise around the other 3, the sum of the digits in each square follows the sequence 20, 19, 18, 17. |
| 8) |
Answer: 1 Explanation: Working from the top row, add the values in adjacent boxes and put this sum in the box directly below, working towards the centre. Repeat this pattern starting at the bottom row as well. |
| 9) |
Answer: 1 Explanation: Values in the lower left table equal the sums of the values in corresponding positions of the top two tables, and values in the lower right table equal the difference in values in corresponding positions of the top two tables |
| 10) |
Answer: 4 Explanation: Working in rows from top to bottom, the sum of the digits in each row increases by 2 each time, from 20 to 30. |
