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

Question

Mathematics

Janiah

6 January, 17:24

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

+4

Answers (1)

Know the Answer?

Danielle Cross · Answer 1

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