-40.8 = -40 4/5
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Sum = ½ × number of numbers × (first number + last number) = ½ × (462 - 408 + 1) × (408 + 462) = ½ × 55 × 870 = 23,925
The answer is 418Improved Answer:-CDVIII = 408
There are an infinite number of possible answers. Think of any number: 2.1358? calculate: 408 - 2.1358 = 405.8642 and then 2.1358 + 405.8642 = 408 You can do that for any of infinite numbers that you can think of. Similarly, apart from 0, you can do that with multiples of any number.
3210 = 408
No. 2 is the only even prime number.