Factors of 30 are 1 , 2 , 3 , 5 , 6 , 10 , 15 , 30.Factors of 60 are 1 , 2 , 3 , 4 , 5 , 6 , 10 , 12 , 15 , 20 , 30 , 60.Factors of 135 are 1 , 3 , 5 , 9 , 15 , 27 , 45 , 135.The Greatest Common Factor is 15
No.
30% o 44million = 0.3 x 44million = 13.2million
202 + 222 = 400 + 484 = 884
The highest common factor of the numbers 40 and 30 is 10.
2 x 3 x 5 = 30 3 x 3 x 3 x 5 = 135
5
The GCF is 27.
HgF
Mercuryfluoride
Molecular formula is Hg2F2 . The empirical formula is HgF . For empirical formulas you reduce the numbers as far as possible.
18k hgf would stand for 18k heavy gold filled ( not solid gold )
It could mean 18 karat "hollow gold filled". I'm not familiar with a manufacturer's hallmark that is "HGF".
Heavy gold filled
31 and 47 are prime, the rest composite.
Factors of 30 are 1 , 2 , 3 , 5 , 6 , 10 , 15 , 30.Factors of 60 are 1 , 2 , 3 , 4 , 5 , 6 , 10 , 12 , 15 , 20 , 30 , 60.Factors of 135 are 1 , 3 , 5 , 9 , 15 , 27 , 45 , 135.The Greatest Common Factor is 15
An angle whose measure is 20 degrees!