Number puzzles
| 1) |
Answer: 11 Explanation: In each triangular group of circles, start with the longest row and add together 3 adjacent values and put this sum in the circle directly above or below the centre of the 3 values. Continue this sequence towards the apex of each triangle. |
| 2) |
Answer: 0 Explanation: Working from left to right and reading each pair of numbers as a 2 digit value, these values represent the sequence of multiples of 7, starting at 49 and finishing on 70. |
| 3) |
Answer: 1 Explanation: Using the numbers in the segments of the lower two circles, the numbers in the upper left circle equal the sum of the numbers in corresponding segments of the lower 2 circles, the numbers in the upper central circle equal the difference between numbers in corresponding segments of the lower 2 circles, and the numbers in the upper right circle equal the product of the numbers in corresponding segments of the lower 2 circles. |
| 4) |
Answer: 3 Explanation: In each row of the diagram, add the left and right hand digits together and add 2 to give the result in the centre. |
| 5) |
Answer: 16 Explanation: Starting with the top left number, and working down one row at a time, alternating between left and right, double the number each time. Repeat this sequence, starting with the top right number. |
