Julie has cats, fish, and frogs for pets. Number of frogs is 1 more than number of cats, and number of fish is 3 times the number of frogs. Which could be total number of these pets?
A. 15
B. 16
C. 17
D. 18
E. 19
How to approach this problem?
@BeCambridge let f = number of frogs. How many cats and fish, in terms of f? The problem should be fairly straightforward from there.
Also, if you have a bunch of math questions in a row, better to condense them into one thread.
MITer94’s method will work. But as is often the case, a sillier, less algebraic approach also works quite easily. Try making up numbers that fit: could it be 1 cat. Then it would be 2 frogs and then 6 fish…does that add up to one of the answers? Nope. Try again. I bet you will get the answer in very little time…