Question

how to find the HCF of 12 15 and 21​

Answer 1

Answer:

H.C.F of 12 15 and 21 is 3

Step-by-step explanation:

Divide 15 by 12

Quotient=1

Remainder=3

now divide 21 by 3

Quotient=7

Remainder=0

When the remainder will become zero.The no. by whom we were dividing becomes the h.c.f.

Answer 2

Step-by-step explanation:

(c)2=(a)2+(b)

(21)2=(12)2+(15)2

441=144+225

441=369

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