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GTExl
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genxer123
GTExl
The product of two numbers is 2028 and their HCF is 13. What are the number of such pairs?

A. 4
B. 3
C. 2
D. 1
E. 5

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13 * 156 = 2,028

26 * 78 = 2,028

39 * 52 = 2,028

That's three pairs. I keep testing GCF because OA is two pairs... What am I missing?

13 is the highest common factor. In the combination 26 * 78, HCF is 26. Hence this combination is out.
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quantumliner
genxer123
GTExl
The product of two numbers is 2028 and their HCF is 13. What are the number of such pairs?

A. 4
B. 3
C. 2
D. 1
E. 5

Kudo please if you liked the ques.
13 * 156 = 2,028

26 * 78 = 2,028

39 * 52 = 2,028

That's three pairs. I keep testing GCF because OA is two pairs... What am I missing?

13 is the highest common factor. In the combination 26 * 78, HCF is 26. Hence this combination is out.
Wow, was that a dumb mistake. I factored 78 incorrectly. Thanks, quantumliner :-)



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