Question

what is the HCF of 420 and 756

Answer 1

Answer:

84

Step-by-step explanation:

prime factorisation of 420:

$2^{2} *3*5*7$

prime factorisation of 756:

$2^{2} *3^{3}*7$

therefore HCF:

$2^{2}*3*7=84$

Answer 2

apply this formula

a=bq +r

after applying this formula until the remainder becomes zero. ...... ....... ŕ