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The first person always wins because they are odd numbers .The pattern goes odd even odd even so because thirty-seven is an odd number the 1st person will win because they have to add an odd number to get up to thirty-seven. You always have to use an odd amount of numbers to get the answer. Because you are adding an odd number every time and the 1st person always wins by adding the last number it is impossible to add the number and for it to be even.