The table below shows all the factors of each of the given numbers - Junior Cycle Mathematics - Question 1 - 2017
Question 1
The table below shows all the factors of each of the given numbers.
(a) Complete the table to show all the factors of 10, 11, and 12.
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Worked Solution & Example Answer:The table below shows all the factors of each of the given numbers - Junior Cycle Mathematics - Question 1 - 2017
Step 1
(a) Complete the table to show all the factors of 10, 11, and 12.
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Answer
Number
Factors
9
1, 3, 9
10
1, 2, 5, 10
11
1, 11
12
1, 2, 3, 4, 6, 12
Step 2
(b) Which one of the numbers 9, 10, 11, or 12 is prime? Give a reason for your answer.
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Answer
Number that is prime: 11 ☑
Reason: 11 has only two factors.
Step 3
(c) Write down three other prime numbers between 0 and 20.
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Answer
Answer = 2, 3, and 5.
Step 4
(d) Find the smallest number that is a multiple of each of the three numbers you chose in part (c).
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Answer
The smallest number that is a multiple of 2, 3, and 5 is 30.
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