The GCF is 70.The GCF is 70.
20
hcf(490, 1750) = 70 Using factorisation: 490 = 2 x 5 x 7² 1750 = 2 x 5³ x 7 hcf = 2 x 5 x 7 = 70
140, 210, 280, 350, 420, 490, 560, 630, +70 . . .
490
The GCF is 70.The GCF is 70.
The GCF is 70.
the answer is 49
The GCF is 70.
The highest common factor of the numbers 490 and 630 is 70.
Factor them both. 2 x 5 x 7 x 7 = 490 2 x 2 x 2 x 5 x 7 + 280 Find the factors in common. 2 x 5 x 7 = 70, the HCF
20
5
28
140, 280, 490, yes. 230, 330, 610, no.
HCF(140, 490) = 70 So 70 and any factor of 70 will do.
Their HCF is 8