The hcf is 7
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Sum = ½ × number of numbers × (first number + last number) = ½ × (462 - 408 + 1) × (408 + 462) = ½ × 55 × 870 = 23,925
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 462 is an even number.
Yes 462 is a composite number because it has more than two factors
PF of 462 = 2 x 3 x 7 x 11
It is clearly and obviously not prime.