Writing 123 base 3 for eighteen is incorrect because the representation of numbers in a specific base must only use digits valid for that base. In base 3, only the digits 0, 1, and 2 are allowed, while the digit 3 is invalid. The correct base 3 representation for eighteen is 200, as it translates to (2 \times 3^2 + 0 \times 3^1 + 0 \times 3^0 = 18).
1*5^2 + 2*5^1 + 3*5^0
123
Not sure about wrighting anything, but you could write it as 123*100 except that is NOT the exponential form.
It is 123,000,000
One hundred twenty-three.
1*5^2 + 2*5^1 + 3*5^0
You write it as 123.
123%
123
CXXIII
123 written as a product of prime factors is: 123 = 3 X 41.
Not sure about wrighting anything, but you could write it as 123*100 except that is NOT the exponential form.
One and twenty three hundredths = 1.23 As a percentage, that is 123%
123
ciento veintitrés
CXXIII
123