this is Quick Math Challenge Game for quick solving math operations
and increasing strong observation

it consists of 6 levels .
each level has 8 math questions of addition and subtraction
and the answer is one number of the 16 numbers .
level 1 has 15 seconds for each question
and by jumping to next level
the time available to solve every question decreases by 2 seconds respectively .
you have 2 wrong answers attempts available in any level
and the 3 third wrong answer leads you to end of the game .

note : I change the distribution of the 16 numbers every 3 seconds .