Fourth Grade Challenging Math------------------------------------------------------------------------------ 4-16) Answers a) 13, 31, 24, 42, 35, 53, 46, 64, 57, 75 Increase by 18, decrease by 7, increase by 18, decrease by 7.... b) 0, 1, 2, 3, 6, 11, 20, 37, 68 Each number (except the first 2 numbers) is the sum of the previous 3 numbers. Example: 6=1+4+3
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4-16) Answers
a) 13, 31, 24, 42, 35, 53, 46, 64, 57, 75
Increase by 18, decrease by 7, increase by 18, decrease by 7....
b) 0, 1, 2, 3, 6, 11, 20, 37, 68
Each number (except the first 2 numbers) is the sum of the previous 3 numbers. Example: 6=1+4+3