Number of primes
Number Theory
Level
2
How many prime numbers are there in the list 1, 12, 123, 1234, 12345, 123456
4
1
3
None
5
2
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
12, 1234, 123456 are divisible by 2 ( Its not prime number )
123 is divisible by 3 ( Its not prime number )
12345 is divisible by 5 ( Its not prime number )
1 isn't regarded as a prime number
So, we can say that there are no prime numbers are in the list