The sum of all the first 100 even numbers is 10,100.
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102
It's 2550
There is only one prime number which is even - that is 2 - and it also happens to be less than 100. All other prime numbers are odd.
102*25=2550
No - although all positive even numbers other than 2 are composite, this does not mean that all composite numbers are even - the first odd composite number is 9, which is equal to 3 x 3.