0
For each given number, add the digits. If the sum comes to nine, then it is divisible by '9'.
234 ; 2 + 3 + 4 = 9 So is dividble by '9'
345 ; 3 + 4 + 5 = 12 = 1 + 2 = 3 Not divisible by '9'
567 ; 5 + 6 + 7 = 18 = 1 + 8 = 9 so is divisible by '9'.
Still curious? Ask our experts.
Chat with our AI personalities
Rafa
Blake
Ezra345 is not divisible by 9. A quick rule for checking to see if a number is divisible by 9 is to add all of the number's digits. If their sum is divisible by 9, so is the number.
2+3+4 = 9, which is divisible by 9, so 234 is divisible by 9. (234/9 = 16)
3+4+5 = 123, which is not divisible by 9, so 345 is not divisible by 9 (345/9 = 38 r 3)
5+6+7 = 18, which is divisible by 9, so 567 is divisible by 9 (567/9 = 63)
Add your answer:
Earn +20 pts
What one digit numbers are divisible by ten?
No one-digit numbers are divisible by 10. 10 is divisible by 1, 2 and 5.
How do you know whether a number is a multiple of another number?
You test by := All EVEN Numbers are divisible by '2' All numbers ending in '5' or ''0' are divisible by '5' All numbers whose digits add to '9' are divisible by '9'. e.g. 234 2+3+4 = 9 All numbers whose form is ' m(m+n)n ' e.g. 132 are divisible by '11'. This leaves only '3' and '7' to test by actual division.
Which is a prime number 234 OR 788 OR 123 OR 563?
Oh, dude, let me drop some math knowledge on you. So, a prime number is a number greater than 1 that can only be divided by 1 and itself. Out of those options, 563 is the only prime number. The rest are just hanging out, being all divisible and stuff.
2 22 13 23 which is not a prime number?
2 is a prime number. It is only evenly divisible by itself and one.22 is composite. 22 = 2 * 1113 is a prime number. It is only evenly divisible by itself and one.23 is a prime number. It is only evenly divisible by itself and one.
What is 769 divisible by?
769 is a prime number. Its only factors are 1 and itself.769 is divisible by itself and one because it is a prime number
