84 + 86 + 88 = 258
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85, 86, 87
-0.258 is equal to -258/1000 so it should be -129/500, if you divide both numbers by 2.
Suppose the smallest number is x. Then the six numbers are x, x+1, x+2, x+3, x+4 and x+5. Their sum is 6x+15 which is 273. So 6x = 273-15 = 258 So x = 258/6 = 43. The six numbers are 43, 44, 45, 46, 47 and 48.
That '8' at the end of it is an immediate tip-off. That tells you that '258' is an even number. All even numbers are composite, because they're all multiples of 2. It so happens that 258 is also divisible by 3, 6, 43, 86, and 129. Any one of these makes it a composite number. But just knowing that it's an even number was enough to tell us that.
To find 65 percent of a number, multiply the number by 0.65. In this instance, 0.65 x 258 = 167.7. Therefore, 65 percent of 258 is equal to 167.7.