1-
A dog caught 38 frisbees in his first 2.5 hours in the park. How many frisbees must the dog catch in the next hour in order to average at least 20 frisbees per hour?
Indicate all such values.
A) 30
B) 31
C) 32
D) 33
E) 34
F) 35
2-
A dog has caught 38 frisbees in his first 2.5 hours in the park. If the dog catches x frisbees in the next half-hour, what values of x would allow the dog to average at least 6x frisbees per hour?
Indicate all such values.
a) 0
b) 1
c) 2
d) 3
e) 4
f) 5
3-
In a certain zoo, 25% of the animals are reptiles. If there are 80% as many birds as reptiles, and the zoo only contains reptiles, birds, and mammals, then what is the ratio of reptiles to birds to mammals?
A) 4:5:11
B) 5:16:1
C) 16:1:5
D) 16:4:5
E) 5:4:11
4-
The ratio of gorillas to lions in a zoo was 5:4. After transferring 13 of the lions to another zoo, the new ratio of gorillas to lions is 7:3. How many gorillas currently reside in the zoo?
a) 35
b) 50
c) 70
d) 90
e) 105
A dog caught 38 frisbees in his first 2.5 hours in the park. How many frisbees must the dog catch in the next hour in order to average at least 20 frisbees per hour?
Indicate all such values.
A) 30
B) 31
C) 32
D) 33
E) 34
F) 35
2-
A dog has caught 38 frisbees in his first 2.5 hours in the park. If the dog catches x frisbees in the next half-hour, what values of x would allow the dog to average at least 6x frisbees per hour?
Indicate all such values.
a) 0
b) 1
c) 2
d) 3
e) 4
f) 5
3-
In a certain zoo, 25% of the animals are reptiles. If there are 80% as many birds as reptiles, and the zoo only contains reptiles, birds, and mammals, then what is the ratio of reptiles to birds to mammals?
A) 4:5:11
B) 5:16:1
C) 16:1:5
D) 16:4:5
E) 5:4:11
4-
The ratio of gorillas to lions in a zoo was 5:4. After transferring 13 of the lions to another zoo, the new ratio of gorillas to lions is 7:3. How many gorillas currently reside in the zoo?
a) 35
b) 50
c) 70
d) 90
e) 105
m.
