It is 80*81/2 = 3240
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463
61 + 67 + 71 + 73 + 79 = 351
There are four pairs of prime integers whose sum is 80. They are: (7, 73) (13, 67) (19, 61) (37, 43)
It is: 8+16+24+32 = 80
The prime numbers between 50 and 80 are 53, 59, 61, 67, and 71. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In this range, these numbers are divisible only by 1 and themselves, making them prime.