Preparatory test

Less than 50 pupils go to 9A class. A third of the pupils wrote the preparatory test with a one, a quarter with a two, no one wrote with a three, and nine pupils with a four. How many students from 9A wrote the test with a five?

Final Answer:

n =  11

Step-by-step explanation:

3 ...  prime number 4=22 9=32 LCM(3,4,9)=2232=36  a=LCM(3,4,9)=36  n=aa/3a/40a/9=3636/336/4036/9=11



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