Sum means to add. You can not add with just one number?
No.
15
6
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 sum of numbers can have as many significant figures as the number with the least significant figures in the original numbers. For example, if you add numbers with 3, 4, and 5 significant figures, the sum will have 3 significant figures.
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)