Sum means to add. You can not add with just one number?
No.
6
15
No factor of 9 has three digits. 450 is a three-digit multiple of 150 (and of 9) with a digit sum of 9.
That would be 6.
450 or 900
To find 5 times the sum of 7 and 23, you first need to calculate the sum of 7 and 23, which is 30. Then, you multiply this sum by 5 to get the final answer. Therefore, 5 times the sum of 7 and 23 is 5 x 30, which equals 150.
sum of 150 what? first 150 numbers?
What is the sum of greatest 3-digit 4-digit 5digit
The number whose farthest right significant digit determines it. Whatever place that digit is in is the last significant digit in the sum. For example: 433 + 150 + 3.67 + 8000 = 8586.67, but in sig figs this is only 9000, as the thousands digit is the lowest digit that can be represented.
sum
I guess you mean: what two numbers sum to 31 and multiply together to get 150? 6 & 25 (6 + 25 = 31, 6 x 25 = 150)