Number Riddle: Find the Missing Number in the Table
Look at the numbers in the table and find the connection between them.
One number is the table is missing so find the missing number.
| 1 | 5 | 6 | 3 |
| 4 | ? | 1 | 2 |
| 9 | 1 | 2 | 3 |
| 1 | 1 | 6 | 7 |
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If you calculate the sum of all the rows and columns in which all the 4 numbers are present you will notice that the sum is 15 in all cases.
So to find the missing number
4 + a + 1 + 2 = 15
7 + a = 15
a = 8
Let’s cross check it by checking the column;
5 + a + 1 + 1 = 15
7 + a = 15
Therefore a = 8
Answer = 8 = missing number.