Question : If the LCM of two numbers 260 and 390 is 780, then find the HCF.
Option 1: 140
Option 2: 133
Option 3: 130
Option 4: 120
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Correct Answer: 130
Solution : Given numbers = 260 and 390 LCM = 780 We know, Multiplication of two numbers = HCF × LCM ⇒ 260 × 390 = 780 × HCF ⇒ HCF = 130 Hence, the correct answer is 130.
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Question : The LCM of the two numbers is 4 times their HCF. The sum of LCM and HCF is 125. If one of the numbers is 100, then the other number is:
Option 1: 5
Option 2: 25
Option 3: 100
Option 4: 125
Question : If LCM of two numbers is 72 and their product is 1728 , then what is the HCF of the numbers?
Option 1: 1
Option 2: 18
Option 3: 24
Option 4: 12
Question : The HCF and LCM of the two numbers are 20 and 2880, respectively. If one of them is 180, then find the other number.
Option 1: 660
Option 2: 350
Option 3: 300
Option 4: 320
Question : The ratio of the LCM of two numbers to the sum of the same two numbers is 12 : 7. If their HCF is 4, what is the product of these two numbers?
Option 1: 192
Option 2: 172
Option 3: 196
Option 4: 169
Question : Two numbers are in the ratio 9 : 7. If their HCF is 6, find their LCM.
Option 1: 189
Option 2: 126
Option 3: 378
Option 4: 252
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