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05 Jul 2022, 16:00
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A
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Difficulty:
5%
(low)
Question Stats:
88% (01:11) correct
12%
(01:12)
wrong
based on 95
sessions
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Not Attempted Yet
The sum of two positive integers is 45. If their difference is 1/9 of their sum, what is their least common multiple ?
(A) 100
(B) 150
(C) 200
(D) 250
(E) 350
(A) 100
(B) 150
(C) 200
(D) 250
(E) 350
05 Jul 2022, 17:01
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Bunuel
x+y = 45
x-y = 5
2x = 50
x=25
y=20
LCM of 20 and 25 is 100
Answer choice A.
05 Jul 2022, 18:33
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LCM = LEAST COMMON MULTIPLE THAT CAN BE FIND THROUGH THE COMMON PRIME FACTORS WITH THE LEAST EXPONENTS.
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