The product of two numbers is 1600 and their HCF is 5. The LCM of the numbers is 

(a) 8000 (b) 1600 (c) 320 (d) 1605

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1 Answers

(c) 320 

Let the two numbers be x and y. 

It is given that: 

x × y = 1600 

HCF = 5 

We know, 

HCF × LCM = x × y 

⇒ 5 × LCM = 1600 

⇒ ∴ LCM = 1600/5 = 320

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