3 + 3 + 3 + 1 + 11 = 21
The answer is 20. In each addition, the individual digits are added together (1+2+3+5+4 = 15)
To 30 digits, pi equals 3.141592653589793238462643383279.
The sum of the digits in 252 is 2 + 5 + 2 which equals 9.
If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
2
Depends on where you start.
There are several hundred of them. One example, the smallest, is 1039
A multiplication problem that equals 42 using the digits 1, 2, 3, 4, 5, 6, 7, 8, and 9 is (6 \times 7 = 42). Both 6 and 7 are composed of digits from the set, and their product equals 42.
digits in a zip code
36 is twice the product of its digits multiplied. 3 times 6 equals 18, and 18 times 2 equals 36.
The sum of the snd 49 equals 384
15