The given numbers of 15 and 35 are not prime numbers but they add up to 50
There are no four consecutive whole numbers that add up to 35. The sum of two consecutive [whole] numbers is an even number plus an odd number which is an odd number. The sum of two consecutive numbers and the two next consecutive numbers is the sum of two odd numbers which is even, but 35 is odd, so no four consecutive whole numbers cannot add up to 35.
-397
161
324
38
35
35
-5 and -7
None. If you add two even numbers, you'll end up with another even number.
357
35