Complete the table to show all the factors of 10, 11, and 12 - Junior Cycle Mathematics - Question 1 - 2017
Question 1
Complete the table to show all the factors of 10, 11, and 12.
Number Factors
9 1, 3, 9
10 1, 2, 5, 10
11 ... show full transcript
Worked Solution & Example Answer:Complete the table to show all the factors of 10, 11, and 12 - Junior Cycle Mathematics - Question 1 - 2017
Complete the table to show all the factors of 10, 11, and 12.
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The factors of the numbers are as follows:
- 9: 1, 3, 9
- 10: 1, 2, 5, 10
- 11: 1, 11
- 12: 1, 2, 3, 4, 6, 12
Which one of the numbers 9, 10, 11, or 12 is prime? Give a reason for your answer.
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The number that is prime: 11
Reason: 11 has only two factors (1 and 11). Therefore, it is a prime number.
Write down three other prime numbers between 0 and 20.
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Find the smallest number that is a multiple of each of the three numbers you chose in part (c) above.
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The smallest number that is a multiple of 2, 3, and 5 is 30, which is the Least Common Multiple (LCM) of these numbers.
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