name 2 numbers less than 20 that give a remainder of 1 when divided by

Question

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Answer 1

19 and 10 give remainder of 1 when divided by 9; 9 and 17 give remainder 1 when divided by 8; 8 and 15 when 7; 7 and 13 when 6. After that there are more than two numbers between 1 and 20. (16, 11 and 6 give remainder 1 when divided by 5, for example.)