Puzzles
13 December
Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums are correct. The sums should be read left to right and top to bottom ignoring the usual order of operations. For example, 4+3×2 is 14, not 10. Today's number is the smaller number in a red box to the power of the larger number in a red box.
| + | - | = 8 | |||
| - | - | - | |||
| + | ÷ | = 3 | |||
| + | ÷ | × | |||
| + | × | = 120 | |||
| = 8 | = 1 | = 8 |
7 December
Put the digits 1 to 9 (using each digit once) in the boxes so that the three digit numbers formed (reading left to right and top to bottom) have the desired properties written by their rows and columns.
| multiple of 25 | |||
| today's number | |||
| all digits even | |||
| multiple of 91 | multiple of 7 | cube number |
4 December
Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums are correct. The sums should be read left to right and top to bottom ignoring the usual order of operations. For example, 4+3×2 is 14, not 10. Today's number is the product of the digits in the red boxes.
| + | ÷ | = 2 | |||
| + | ÷ | - | |||
| ÷ | - | = 5 | |||
| ÷ | - | × | |||
| - | × | = 4 | |||
| = 3 | = 5 | = 6 |
20 December
Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums reading across and down are correct. The sums should be read left to right and top to bottom ignoring the usual order of operations. For example, 4+3×2 is 14, not 10.
| + | - | = 8 | |||
| - | - | - | |||
| + | ÷ | = 9 | |||
| + | ÷ | × | |||
| + | × | = 108 | |||
| = 6 | = 1 | = 18 |
The answer is the product of the digits in the red boxes.
18 December
Put the digits 1 to 9 (using each digit once) in the boxes so that the three digit numbers formed (reading left to right and top to bottom) have the desired properties written by their rows and columns.
| multiple of 9 | |||
| multiple of 3 | |||
| multiple of 5 | |||
| multiple of 6 | multiple of 4 | cube number |
Today's number is the multiple of 6 formed in the left hand column.
13 December
Put the digits 1 to 9 (using each digit once) in the boxes so that the three digit numbers formed (reading left to right and top to bottom) have the desired properties written by their rows and columns.
The row marked sum is equal to the sum of the other two rows. The column marked sum is equal to the sum of the other two columns.
| odd | |||
| all digits even | |||
| sum | |||
| even | odd | sum |
Today's number is the largest three digit number in this grid.
12 December
Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums reading across and down are correct. The sums should be read left to right and top to bottom ignoring the usual order of operations. For example, 4+3×2 is 14, not 10.
| + | - | = -2 | |||
| - | - | - | |||
| + | ÷ | = 4 | |||
| + | ÷ | × | |||
| + | × | = 50 | |||
| = 4 | = -4 | = 10 |
The answer is the product of the digits in the red boxes.
6 December
Put the digits 1 to 9 (using each digit once) in the boxes so that the three digit numbers formed (reading left to right and top to bottom) have the desired properties written by their rows and columns.
| multiple of 5 | |||
| multiple of 7 | |||
| cube number | |||
| multiple of 9 | multiple of 3 | multiple of 4 |
Today's number is the multiple of 5 formed in the first row.