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### Edward J. Palumbo says

Following this sequence,

3 x 6 = 18

4 x 8 = 32

5 x 10 = 50

6 x 12 = 72

7 x 14 = 98

8 x 16 = 128

9 x 18 = 162

then 10 x 20 = 200.

### Janis Leslie Evans says

I will say the answer is 200 if I'm following the multiplication pattern that has been established.

I agree with your method and your answer.

### John Goodwin White says

I'd say that 10 = 200. As the first number of each answer needs to be multiplied by the next even number in succession to the last. Or words to that effect lol.