What is the missing number?

Official explanation

The pattern is based on multiplying each outer number by consecutive odd numbers, moving clockwise from the top. The multipliers are always: 1 → 3 → 5 → 7 Then we add the four results to get the number in the center. First diamond Starting from the top and moving clockwise: Top: 3 × 1 = 3 Right: 15 × 3 = 45 Bottom: 12 × 5 = 60 Left: 5 × 7 = 35 Now add them: 3 + 45 + 60 + 35 = 143 So the center number is 143. Second diamond 8 × 1 = 8 4 × 3 = 12 9 × 5 = 45 7 × 7 = 49 8 + 12 + 45 + 49 = 114 So the center number is 114. Third diamond Applying the same pattern: 6 × 1 = 6 2 × 3 = 6 11 × 5 = 55 10 × 7 = 70 6 + 6 + 55 + 70 = 137 Therefore, the missing number is 137. In short: start at the top, multiply the four outer numbers by 1, 3, 5, and 7 clockwise, and add the results.