No. The number 563 is prime and is only divisible by 1 and itself.
1, 3, 9, 563, 1689, 5067.
The 3, to the left.
x
NO. 5,630 is only divisible by: 1, 2, 5, 10, 563, 1126, 2815, 5630.
If x is an integer divisible by 3, is x squared divisible by 3?
563 is!
1, 3, 9, 563, 1689, 5067.
The 3, to the left.
x
The only even prime is 2, so neither 234 nor 788 is prime. Since 1+2+3=6 is divisible by 3, the divisibility test for 3 says 123 can not be prime. If one of the options must be prime, then we know it is 563. Just to check:563 is odd and not divisible by 3,5,7,11,13,17,19, or 23. Since it is not divisible by any primes less than its square root, we know that 563 is not divisible by any whole numbers other than itself and one and is hence prime.
5, 25, 563, 2815
NO. 5,630 is only divisible by: 1, 2, 5, 10, 563, 1126, 2815, 5630.
It is: 5*100+6*10+3*1 = 563
No, it is divisible by 3.No, it is divisible by 3.No, it is divisible by 3.No, it is divisible by 3.
40.2143
It is divisible by 3, for example.It is divisible by 3, for example.It is divisible by 3, for example.It is divisible by 3, for example.
A number is divisible by 3 if the sum of its digits is divisible by 3.