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Hoochie [10]
2 years ago
5

If there is 1 child, there can be 0 interactions.

Mathematics
1 answer:
Digiron [165]2 years ago
5 0

Find the differences:

3-0 = 3

9-3 = 6

18-9 = 9

The differences increase by the previous difference plus 3

So 5 kids would have 9+3 = 12  + 18 = 30 interactions.

6 kids: 30-18 = 12 +3 = 15 + 30 = 45 interactions.

7 kids: 15+3 = 18 + 45 = 63 interactions.

8 kids: 18 +3 = 21 + 63 = 84 interactions.

9 kids: 21+3 = 24 + 84 = 108 interactions.


The answer is d. 108

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