Year 9 - Maths - 14-9-15

Thai Sikh International School

E-Learning Programme – Online Assignment –   dd/mm/yyyy

Name :                                                                                                                        Subject : maths

Year   :           9 A/B                                                                                                  Schedule No. :                                   

HCFs, LCMs and Prime Factors

1.         (a)        Write 28 as the product of its prime factors.

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(2)

 (b)       Find the least common multiple (LCM) of 28 and 42.

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(2)

(Total 4 marks)

2.         (a)        Write 18 as the product of its prime factors.

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(2)

(b)        What is the least common multiple (LCM) of 12 and 18?

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(1)

(Total 3 marks)

3.         (a)        Express 36 as a product of its prime factors.

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(3)

 (b)       Find the Highest Common Factor (HCF) of 36 and 60.

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(2)

(Total 5 marks)

4.         (a)        Express 144 as the product of its prime factors.
Write your answer in index form.

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(3)

(b)        Find the Highest Common Factor (HCF) of 60 and 144.

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Answer ..................................................................

(2)

(Total 5 marks)

5.         Express 120 as the product of its prime factors.
Give your answer in index form.

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Answer ............................................................

(Total 3 marks)