The number is 875 and its prime factors are 5; 5; 5 & 7.
63
630
63
Yes, yes, and no. 3- sum of digits must be multiple of 3. 6- sum of digits must be multiple of 3 and number must be even (multiple of 2). 9- sum of digits must be multiple of 9. (The sum of the digits here is 21.)
digits
20
The number is 490.
I have two digits.I am between 16 and 24.I am one-quarter of a multiple of ten
There is no such number.
77
63
630
18
19
63
Try the different numbers - there are only 11 after all - and multiply their digits. Or analyze the factors of the number 21.
Yes, yes, and no. 3- sum of digits must be multiple of 3. 6- sum of digits must be multiple of 3 and number must be even (multiple of 2). 9- sum of digits must be multiple of 9. (The sum of the digits here is 21.)