Which of the following is a factor pair of the number 20?
A
(4,6)
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B
(4,5)
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C
(3,7)
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D
(2,20)
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Solution
The correct option is B(4,5) The factors of 20 are 1, 2, 4, 5, 10, 20 as follows:
1 × 20 = 20
2 × 10 = 20
4 × 5 = 20
From the given options, (4, 5) is the factor pair of 20.