Math Puzzle #2 - Be First to Answer Correctly and win SBD!

What is the missing number?
Challenge your mind by solving the 'Math' puzzle above. The first person with the correct answer will receive 0.1 SBD
To win the prize you have to:
- Provide Correct Answer
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Prizes will be sent directly to your account within 48 hours of correct answer.
10
17
It is the sum of the two digits(9 + 8) in opposite quadrant.
@brainteasers Thank you, I will wait for two days.
17 is the correct number and you were the first to answer!! Congratulations! SBD is on it's way!! Hope to see you play again soon.
thankyou just received it.
I have no idea
Ans. 17
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17
17
17
Hi brainteasers! The missing number is 10