0.
Because 456 + 0 = 456. and the digit 4 is used twice in the sum.
the answer should be 456
3 significant figures.
401
Yes - since the sum of the digits of the number 456 is equal to a multiple of 3, 456 is divisible by 3 - in this instance, 456/3 = 152.
567
Three. All non-zero numbers are significant.
Three
Three. All nonzero digits are significant.
Three - all nonzero digits are significant.
The number 456 can be represented by the Roman numeral CDLVI
0 123 456 OR if you don't want to count the zero: 1 234 567
The number 456 is spelled "four hundred fifty-six."