Hello Steemenians,
Introducing My Self; I am a Maths Teacher.

Dear Steemit Users, Solve This Maths Skills Puzzle Game Contest 55.
Reply, Which number replaces the question mark?

Options:
A. 9
B. 10
C. 13
D. 7
I hope you will help me to solve this and reply with your answer.
Reward:
Who Upvote this post & give Right answer, I will Upvote their latest post on their blog page.
