Question

11. The LCM of the two numbers is 420. Which of the following CANNOT be the HCF of the two
numbers?
(a) 80
(b) 60
(© 210
(d) 70​

Answer 1

Answer:

THE ANSWER IS 80

Let the other number be x

Given:LCM+HCF=600

⇒14HCF+HCF=600

⇒15HCF=600

⇒HCF=40

⇒LCM=14×40=560

Since HCFxLCM=Product of 2 numbers

=>40×560 = 280×x

⇒x=

280

40×560

⇒x=40×2

⇒x=80

hence the other number is 80.

Step-by-step explanation:

HOPE IT HELPS YOU✌✌

Answer 2

Answer:

dear your answer is d) 80

Step-by-step explanation:

LCM of 420 = 2×2×3*5×7

hence of HCF = 70 , 60 and 210 is factor of 420 only 80 is not factor of 420 so answer is (d)80