Cats and Dogs

[karthikpandian19]

Martha has 5 dogs and 4 cats. She takes each animal seperately to a daily walk. She can take the animals to a walk to the park or to the barber shop. How many different options for a walk with a single animal does Martha have?

8
9
10
18
20

Does these kind of simple problems occur in GMAT? When these simple problems are asked, i ponder on the answer choices and end up with the wrong one with the suspicion whether GMAT asks simple questions?
This question Source: Master GMAT

[limestone]

My simple thinking is that:

Martha has 9 different animals
Two places to go

Thus she has 9 x 2 options of walking with one animal to a single place.

GMAT does have some simple question. I usually get math score of 50 but sometimes end up doing some simple questions at the end of my math section (in GMATPrep).

[karthikpandian19]

OA is D.....18

[Scott@TargetTestPrep]

Martha has 5 dogs and 4 cats. She takes each animal seperately to a daily walk. She can take the animals to a walk to the park or to the barber shop. How many different options for a walk with a single animal does Martha have?

8
9
10
18
20

The number of choices for the animals is 9, and the number of locations is 2, so the total number of options is 9 x 2 = 18.

Answer: D