Factors S5 HW1

Once all the common factors have been divided out using the ladder method, how do you find the Highest

Common Factor?

• Multiply all the common factors from the left side of the ladder.
• Multiply all the numbers on the outside of the ladder.
• Use the numbers at the bottom of the ladder.
• Switch the numbers at the bottom of the ladder.

HCF of 8 and 11

• 11

• 88

• 8

• 1

What does HCF stand for?

• Highest common factor

• Highest core frequency

• Highest common frequency

• Highest core factor

Find the HCF of 30 and 36

• 2
• 3
• 4
• 6

Find the highest common factor between 45 and 75

• 9

• 25

• 5

• 15

Find the highest common factor between 24 and 48

• 12

• 24

• 6

• 8

Use the picture attached to find ALL errors.

SELECT ALL THAT APPLY!!!

• There's no error

• The 15 should have been a 5

• The 30 should have been a 6

• The factoring should have stopped at 5 and 6

Complete the ladder method.

d

e

a

4

2

3

3

1

5

10

Find the HCF of 14,36,42

• 18
• 2

• 30
• 14

1. Find the HCF of 68, 76 and 94.

• 4
• 6
• 8
• 2