GCSE Maths - What are Ratios & How to Simplify Them (Part 1) #81

The video tutorial explains the concept of ratios using marbles as examples. It covers how to define ratios, simplify them by finding common factors, and provides examples with blue, red, and purple marbles. The tutorial also discusses calculating ratios involving total numbers and introduces complex ratios with more than two values.

What does a ratio of 3:6 represent in terms of blue and green marbles?

• For every 2 blue marbles, there are 3 green marbles.

• For every 6 blue marbles, there are 3 green marbles.

• For every 1 blue marble, there are 3 green marbles.

• For every 3 blue marbles, there are 6 green marbles.

How can the ratio 8:6 be simplified?

• 3:2

• 5:4

• 2:1

• 4:3

What is the simplified ratio of purple marbles to the total number of marbles if there are 6 purple marbles and 14 total marbles?

• 2:5

• 1:2

• 6:14

• 3:7

If a group of marbles has a ratio of 2:5:3 for green, blue, and purple marbles, what does this mean?

• There are 3 green marbles for every 5 blue and 2 purple marbles.

• There are 5 green marbles for every 2 blue and 3 purple marbles.

• There are 2 green marbles for every 5 blue and 3 purple marbles.

• There are 2 green marbles for every 3 blue and 5 purple marbles.

When is a ratio considered to be in its simplest form?

• When there is no common factor between the numbers.

• When the numbers are equal.

• When the numbers are both prime.

• When the numbers are consecutive.