Ratio Question From Cambridge Primary Mathematics Workbook 5 Second Edition

[sh197]

(1) Use for every to describe the ratios.

3, 11, 36, 15, 20, 7, 49, 14, and 9

Complete the two sentences each time.

For every ____ odd numbers, there are ____ even numbers.

 

For every ____ even numbers, there are ____ odd numbers.

 

For every ____ 1-digit numbers, there are ____ 2-digit numbers.

 

For every ____ 2-digit numbers, there are ____ 1-digit number.

 

For every ____ square numbers, ____ numbers are not square.

 

For every _____ numbers that are not square, ____ are square numbers.

 

 

(2) Now make up your own puzzle about ratio by writing some numbers in the box so that:

 

a. For every two multiples of five, there are three multies of six.

b. For every three odd numbers, there are seven even numbers.

[newmodarmy]

First one 2 to 1 or 4 to 2 or 6 to 3

[Tuvok]

There are more gaps than supplied numbers

[newmodarmy]

Then 1 to 2

[newmodarmy]

Then 1 to 2 then 2 to 1

1 Square to 2 non square.....

[newmodarmy]

The plurals suggest they want unsimplified like 6: 3

[THECORBYLOON]

It might just be an error in the typing but

For every ____ 2-digit numbers,[plural] there are [plural] ____ 1-digit number.[singular]

[newmodarmy]

the 'are' in this and some others should say 'is'

[THECORBYLOON]

They might not want the simplest ratios.

[newmodarmy]

Yes, that's why I said they could want 6: 3, but they'd have to accept 4: 2 or any other equivalent ratio