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(1a)

5760/9=640

640=2^7x5

X=7

Y=1

(1b)

5/3=1r2

1/3=0r1

1/3=0r1

3-2=1

3-1=2

3-1=2

K=2^2x3x11^2=1452

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Iain Tan

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(a)

520= 2^3 x 5 x 13

1600 = 2^6 x 5^2

LCM = 2^6 x 5^2 x 13

(b)

HCF = 2^3 x 5 = 40

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my working

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Highest common factor=2^2x3^2

Lowest common factor =2^2x3^2x5x7^2

LCM divided by HCF=5x7^2

1764=2^2x3^2x7^2

LCM/1764=5

P=2^2x3^2x5=180

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PART A

(1a)

42=2x3x7

66=2x3x11

78=2x3x13

HCF=2x3=6

(1b)

9=3^2

16=2^4

18=2x3^2

LCM=2^4x3^2=144

(2a)

LCM=2^6x5^2x13=20 800

(2b)

HCF=2^3x5=40

PART B

(1a)

5760/9=640

640=2^7x5

X=7

Y=1

(1b)

5/3=1r2

1/3=0r1

1/3=0r1

3-2=1

3-1=2

3-1=2

K=2^2x3x11^2=1452

(2a)

-√10 816=-(√10 816)=-(104)=-104

(2b)

∛13 824=24

(3)

HCF=2^2x3^2

LCM=2^2x3^2x5x7^2

LCM/HCF=5x7^2

1764=2^2x3^2x7^2

LCM/1764=5

P=2^2x3^2x5=180

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Last checked: 1 Feb 5.30am

Group 1: 13 points

Group 2: (STAY BACK) 17 points

Group 3: (STAY BACK) 20 points

Group 4: 16 points

Group 5: STAY BACK - Revision A2 Q2, Q3 missing

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Show your working clearly.

Use either factor tree or long division to find the prime factorisation of each number.

Show how you apply the concept of roots to find the answers

2(a) [3m]

2(b) [3m]

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Show your working clearly.

Use either factor tree or long division to find the prime factorisation of each number.

Show how you apply the concept of HCF and LCM to find the answers

3 [4m]

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Show your working clearly.

1(a) [2m]

1(b) [2m]

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2(i) [1m]

2(ii) [2m]

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Show your working clearly.

Use either factor tree or long division to find the prime factorisation.

Express the numbers in index notation.

Use INDEX NOTATION to find the answers.

1(a) [3m]

1(b) [3m]

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Instructions to post in your group

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The task: Textbook 1A REVISION EXERCISE A1

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The task: Textbook 1A REVISION EXERCISE A1

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There are altogether 5 questions.

Each member of the group shall take charge of 1 question - the group shall discuss who will be in-charge of which question.

1. You will refer to the question in your textbook

2. Attempt the question in your notebook

3. Label the question clearly when you post your work

4. Remember to indicate your name