What is the sum of all prime numbers between 60 and 80?
Answer: A
We need to identify the prime numbers between 60 and 80.
Prime numbers are: 61, 67, 71, 73, 79.
Sum = \(61 + 67 + 71 + 73 + 79\).
Sum = \((60+1) + (60+7) + (70+1) + (70+3) + (70+9) = 120 + 210 + (1+7+1+3+9) = 330 + 21 = 351\).