The ratio of cats to dogs to birds to fish is 7:8:9:10. There are no other types of animals in the pet store.which of the following cannot be the total number of animals in the store? Pick one:
A) 68  B) 102  C) 136  D) 170  E) 210
The parts add up to 7 + 8 + 9 + 10= 
<gadget id="calculator">7 + 8 + 9 + 10</gadget>
<output>34</output>
34, so we know that any possible number of total answers must be a multiple of 34. All five answer choices are multiples of 34:   (A) 68= 34*2   (B) 102= 34*3   (C) 136= 34*4   (D) 170= 34*5   (210) 210 = not multiple of 34
<result>E</result>
The ratio of cats to dogs to birds to fish is 7:8:9:10. There are no other types of animals in the pet store.which of the following cannot be the total number of animals in the store?