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First of all welcome to steemit family.use more tags to get more attention to your post. Hope u enjoy on steemit

Thanks for your suggestion..
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160 is the answer

No 200 is the answer
2×3^2=18
2×4^2=32
2×5^2=50
2×6^2=36
2×7^2=98
2×8^2=128
2×9^2=162
2×10^2=200

congratulations!

  ·  7 years ago (edited)

no @chaitanya77 answer is 200.
let me give you the explanation..
36 = 18 where 6 is 2 times of 3
4
8 = 43 where 8 is 2 times of 4
5*10 = 50 where 10 is 2 times of 5
and that's how it become 200.
hope you understand :-)

Ok😀