29 & 41
There are five ways to get a sum of 70 with two prime numbers: 3 + 67 = 70 11 + 59 = 70 17 + 53 = 70 23 + 47 = 70 29 + 41 = 70.
the 2 numbers are 51 and 19
70 + 19 = 89 or: the sum of 70 and 19 is 89
If the sum of the original seven numbers is 2814, and they're all increased by 70, the new total will be 2814+490=3304
29 & 41
There are five ways to get a sum of 70 with two prime numbers: 3 + 67 = 70 11 + 59 = 70 17 + 53 = 70 23 + 47 = 70 29 + 41 = 70.
the 2 numbers are 51 and 19
The two numbers are 10 and 2
70 + 19 = 89 or: the sum of 70 and 19 is 89
If the sum of the original seven numbers is 2814, and they're all increased by 70, the new total will be 2814+490=3304
Since there are 2 numbers in the group, the group average is 1/2 of their sum.
There cannot be any such set of numbers. The sum of any five odd numbers must be odd and so cannot be 70.
-20
The sum of the first 70 consecutive odd numbers is 4,900.
The numbers are 69, 70, and 71.
4900