twenty
2 4 6 8
The sum is 17.
15
It is: 2*3*5*7 = 210
There are 320 such numbers.
They will always add up to another even number.
You can figure out the "composite numbers" from any table of primes - all the positive integers that are not prime numbers are composite (the number one should also be excluded). The first four composite numbers are:4, 6, 8, 9
the first four numbers are....... 3.141592654
Infinitely many. If you restrict yourself to positive numbers only, but allow repetitions, then there are 15. If you disallow repetitions, only 2.
There are four even numbers between one and nine. the four even numbers are 2,4,6 and 8.
If n is the first number, n + n + 1 + n + 2 + n + 3 will be the sum, which is 4n + 6. 4n is always even, and 6 is even. Therefore, the sum of four consecutive numbers is always even.
The numbers that are divisible by two are infinite. The first four are: 2,4,6,8 . . .