Arjun can answer 30 math facts in 60 seconds. How many math facts can Arjun solve in 8 seconds?

Question

I am 7 but mum force me to go 6th grade but have learn problem

Answer 1

30 problems ? problems

---------------- = -------------------

60 seconds 8 seconds

cross multiplies:

30*8 = 60 *?

240 = 60*?

240/60 = ?

4 = ?

4 problems in 8 seconds

incidentally the proportion ration is 30/60 = 3/6 = 1/2, so 1 problem every 2 seconds