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1+4=5 2+5=12 3+6=21 8+11=?
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5 votes
1+4=5
2+5=12
3+6=21
8+11=?

User Janvi Vyas
by
7.9k points

1 Answer

3 votes
Nice question! The rule is:

a + b = a(b + 1)

So...

1 + 4 = 1(4 + 1) = 1(5) = 5

2 + 5 = 2(5 + 1) + 2(6) = 12

3 + 6 = 3(6 + 1) = 3(7) = 21

8 + 12 = 8(12 + 1) = 8(13) = 104

The answer is 104.
User Afterglowlee
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8.1k points
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