Question

Mary wants to put 1/10 of a kilogram of bird seed in each of the bird cages in her pet shop. She has 3/10 of a kilogram of bird seed left. How many cages can she refill with bird seed?

A) 3

B)1/3

C) 3/100

D) 100/3

Answer 1

A) 3

Explanation:

If you simply look at the given numbers, it should be pretty clear that 3 tenths is 3 times 1 tenth.

When Mary puts 1/10 kg in each cage, she can do that for 3 cages with 3/10 kg of bird seed.

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If you let c represent the number of cages, then the amount of bird seed used will be (1/10)c. This will be equal to the amount available when we use it all for filling cages:

(1/10)c = (3/10)

Multiply both sides of the equation by 10:

c = 3

Mary can fill 3 cages with available seed.