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The sum of four prime numbers of two digits is 204. The sum of the first and last i.e, (p_1 + p_4) is same as the sum of second number p_2 and third number p_3 (i.e., p_2 + p_3). Again p_3 - p_2 = 2 (p_2 - p_1) = 2 (p_4 - p_3). The average number of all the four numbers is not a prime number, but a product of two prime numbers one of these prime numbers (out of four) is : |
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Answer» 23 |
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