Question

David, Ping, Mandy, and Alan are each studying one of the animals.
Animal Study Project
Animal
Speed
Type
Habitat
Elephant
25 mph (running)
Mammal
Grasslands
Sailfish
68 mph (swimming)
Fish
Oceans
Giraffe
32 mph (running)
Mammal
Grasslands
Dolphin
30 mph (swimming)
Mammal
Oceans
Source: www.worldalmanacforkids.com

David is studying a mammal, but Ping is not. The animal that Mandy is studying can be found in the ocean. The animal that Alan is studying is slower than the animal that David is studying.
Which animal is David studying?
a.
Dolphin
b.
Elephan

Answer 1

David is studying the giraffe.

You got 4 people...David,Ping,Mandy, and Alan
You got 4 animals...
elephant -- mammal -- grasslands
sailfish -- fish -- ocean
giraffe -- mammal -- grasslands
dolphin -- mammal -- ocean

Ping is NOT studying a mammal....so that leaves Ping with the sailfish (because all the rest are mammals)

The animal that Mandy is studying is in the ocean...that leaves Mandy with the dolphin, because Ping already has the only other animal that is in the ocean.

The animal Alan is studying is slower then the animal David is studying. We only have 2 animals left, and the elephant is slower, so Alan has the elephant, leaving David with the giraffe.