Math Challenge

How many problems you can solve in 30 second?
There are four math operations +... ÷... ×... - .
We can calculate numbers easily but if you have a short time, Did you ask yourself, How many math problems can i solve ?
This math challenge takes 30 seconds to challenging yourself. It is easy but at the same time difficult when you have short time.
When you press Go button the time will start.
Don’t forget to Share your score with your friend.