Hard
Complete the number grid by finding the missing value: Row1: 5, 7, 74 | Row2: 11, 8, 185 | Row3: 13, ?, 205
Explanation
Explanation
In each row, the third number equals the sum of the squares of the first two numbers: 5 squared + 7 squared = 25+49=74 (matches row1); 11 squared + 8 squared = 121+64=185 (matches row2). For row 3: 205 - 13 squared = 205-169=36, and the square root of 36 is 6. The missing value is 6.
PRO TIP
Re-check your working by substituting the answer back into the original question.