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Source: Textbook Exercise 1C (p25)

Express each number in INDEX NOTATION before determining the Lowest Common Multiple (LCM).

Note: Do not leave your final answer in index notation unless you are told to do so.

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There are 6 questions in total.
1. You shall attempt the question that is assigned to you first.
2. Take a CLEAR photo of the working and answer.
3. Post it in the assigned column.
4. You should attempt the rest of the questions as a practice to improve your procedural fluency.

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5(a) Find LCM of 45 and 60

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5(c) Find LCM of 54 and 240

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5(f) Find LCM of 78 and 352

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7(a) Find LCM of 12, 18 and 81

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7(c) Find LCM of 3, 7 and 11

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7(d) Find LCM of 25, 27 and 32

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Hector Tan (17)

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Darrius Lek 11

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2 | 12.      2 | 18.     3 | 81
2 | 06.      2 | 09.     3 | 27
3 | 03.      3 | 03.     3 | 09
01.            01.     3 | 03
01

12 = 2 ² x 3
18 = 2 x 32
81 = 3 4

LCM = 22 x 34
= (2 x 2)(3 x 3 x 3 x 3)
= 4 x 81
= 324

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Darrius Lek 11 (Redo)

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Shawn 24