Question

1. Which of the following pairs of numbers are co-primes ?
(i) 12,30
(ii) 8, 21
(iii) 54, 144
(Hint: Two numbers are co-primes if their H.C.F. is 1.)
2. Using division method, find H.C.F. of:
(1) 398, 436, 542
(ii) 150, 140, 210 (iii) 2057, 3267
(iv) 1440, 1800, 1920
(v) 276, 1242
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Answer 1

Answer:

1 part

(II). option is correct

Answer 2

Answer:

                     Here you go mate

Step-by-step explanation:

1. Ans ( ii ) 8 , 21

2. i) H.C.F of 398, 436, 542 = 2

  ii) H.C.F of 150, 140, 210 = 10

 iii) H.C.F of 2057, 3267 = 121

  iv)  H.C.F of 1440, 1800, 1920 = 120

   v) H.C.F of 276, 1242 = 138

Hope it was helpful.

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