Year 7 Number Jeopardy

Highest Common Factor

100

What is the HCF of 15 and 25?

5

200

What is the HCF of 15 and 60?

15

300

What is the HCF of 48 and 72?

24

400

What is the HCF of 6, 15 and 42?

3

500

What is the HCF of 18, 13 and 21?

1

Lowest Common Multiple

100

What is the LCM of 4 and 6?

12

200

What is the LCM of 6 and 9?

18 

300

What is the LCM of 12 and 18?

36

400

What is the LCM of 3, 5 and 9?

45

500

What is the LCM of 3, 4 and 7?

84

Square Numbers

100

9² + 3² = 

90

200

11² in expanded form is

11 x 11

300

10² - 8² - 6² =

0

400

3² - 2² +5²

30

500

5² - 4² + 3² 

Pythagoras' Theorem

Prime Numbers

100

Is 9 a prime number?

No

200

List the first 5 prime numbers?

2, 3, 5, 7, 11

300

How many prime numbers are there between 1 and 144?

34

400

List the prime numbers between 40 and 50

41, 43 and 47

500

List all the prime numbers between 80 and 100.

83, 89 and 97

Ecosystems

100

In a food chain or food web, what are producers?

Plants

200

Secondary Consumers are always Carnivores - True or False? Why?

False, because they could be omnivores.

300

List 3 Abiotic factors

Any 3: wind speed, temperature, humidity, rainfall, oxygen saturation

400

List 3 Biotic Factors

Any: Mutualism, Competition, Predation, Commensalism, Etc.

500

You know if the gas taps on the Bunsen burner are on if they are: perpendicular or parallel?

If leaving a Bunsen burner unattended, it must be on the 'what' flame?
A closed collar on Bunsen burner barrel will lead to what type of flame?

Parallel
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