Ratios and Rates

Hong Kong

Stage 1 - Stage 3

Which of the following is cheaper per item: $6$6 pencil cases for $\$24$$24 at Shop ZYX or $9$9 pencil cases for $\$54$$54 at Shop PWR?

a

What is the cost of a single pencil case at Shop ZYX?

b

What is the cost of a single pencil case at Shop PWR?

c

Hence which is the best place to buy pencil cases, if you want the best price per item?

Shop ZYX

A

Shop PWR

B

Easy

Approx a minute

Which is cheaper: $148$148 cherimoyas for $\$355.20$$355.20 at Shop ZYX or $252$252 cherimoyas for $\$655.20$$655.20 at Shop PWR?

An industrial detergent requires $19$19 mL of water to be added to every $1$1 mL of the detergent for safe usage.

How many litres of water must be added to $610$610 mL of detergent?

The admission for a concert starts at 6pm and closes at 7pm. If there are 900 people attending and they arrive at a constant rate, what is the flow of people per minute?

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