1 + 71 = 8
8 + 72 = 57
57 + 73 = 400
400 + 74 = 2801
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57
The difference between each number is decreasing by 1 each time. Therefore, the difference between the final number and the next number in the sequence will be 6. Therefore, 50 - 6 = 44.
37: How? Every time a new number is put into the sequence, when you subtract it from the number before it, it will equal an odd number of greater value. For example; 72-69=3 69-64=5 64-57=7 57-48=9 48-37=11
At each step the number being subtracted is reduced by 9 298 - 89 = 209 209 - 80 = 129 129 - 71 = 58 58 - 62 = -4 -4 - 53 = -57..........which is the next number.
8^2 = 64