Farmer Brown raises only chickens and cows on his farm. Each morning he counts their legs.
Today he finds that he has 90 legs in all.
He has twice as many cows as chickens.
How many chickens does he have?

Ndndndndndndndndndnd

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.