Generally, single digit numbers are written out as one, two, three, etc.
TWO
Common factors are the factors that two or more numbers have in common. The common factors of 4 and 6 are 1 and 2. (This is one way to write it.) Some people write it as: 1 and 2 are the common factors of 4 and 6. Some people write it as: common factors (4,6) = 1, 2 If you writing the greatest common factor, which is the largest of the common factors, you can write it in words, as above, or as: GCF (4,6) = 2.
The number 2 is spelt 'two'.
Two sheep.
2/4
2/3
Two.
2%
Two-tenths mg
Two million two.
2 over 2 or 1
0.002 or 2/1000 is two thousandths.