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My son has the following missing number pattern to solve.
? 17 37
29 38 9
1 21 ?
I can not figure this out. What is the answer for the questions marks?
the only complete pattern is the middle one we see that 38-29=9 so the middle number minus the first number equals the third number for the last row 21-1=20 so you have 1 21 20 for the first one
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