Question

Find the HCF of 420, 980 and 1260.​

Answer 1

Answer:H.C.F=28

Step-by-step explanation:

420=2*2*3*5*7

980=2*2*5*7*7

1260=2*2*3*3*3*7

H.C.F=2*2*7=28

Answer 2

SOLUTION

TO DETERMINE

The HCF of 420 , 980 and 1260.

CONCEPT TO BE IMPLEMENTED

HCF :

For the given two or more numbers HCF is the greatest number that divides each of the numbers

EVALUATION

Here the given numbers are 420 , 980 and 1260.

We prime factorise the given numbers

420 = 2 × 2 × 3 × 5 × 7

980 = 2 × 2 × 5 × 7 × 7

1260 = 2 × 2 × 3 × 3 × 5 × 7

Hence the required HCF

= 2 × 2 × 5 × 7

= 140

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