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mr Goodwill [35]
4 years ago
8

What number is missing from this pattern1,5,13,25,_,61,85

Mathematics
1 answer:
katrin2010 [14]4 years ago
4 0
First number is 5.
second  is 5 + (4 * 2) = 5 + 8 = 13

third is 5 + (4 * 2) * (4 * 3) = 5 + 8  + 12 = 25

fourth is 5 + (4 * 2) * (4 * 3) + (4 * 4) = 5 + 8  + 12  + 16 = 41

fifth is 5 + (4 * 2) * (4 * 3) + (4 * 4) + (4 * 5) = 5 + 8  + 12  + 16  + 20 = 61

sixth is 5 + (4 * 2) * (4 * 3) + (4 * 4) + (4 * 5) + (4 * 6) = 5 + 8  + 12  + 16  + 20 + 24 = 85

So missing number is 41
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