Add them all together and divide by the amount of numbers so:
220 + 256 + 258+ 240 = 974
974 divided by 4 = 243.5
There are four of them, which are 256, 258, 259 and 260.
258/1000= .258
60% off 258 = 258 - (0.6 x 258) = 103.2
319.92= 124%/100% * 258= 124/100 * 258= 1.24 * 258= 319.92
258-144 = 114
It is 287.
Mendelevium 256 has 155 neutrons and mendelevium 258 has 157 neutrons.
There are four of them, which are 256, 258, 259 and 260.
256 for 2007 258 for 2008
256 + 258 = 514
258
250, 252, 253, 254, 255, 256, 258, 259, 260.
The book "Thirteen" by Lauren Myracle has 258 pages.
No because they are both composite numbers
1000, 1023122434, 1243234 are all even numbers that come after 256. In increasing order the even numbers that immediately follow after 256 are 258, 260, 262, 264, ... In decreasing order, the even numbers that immediately follow 256 are 254, 252, 250, 248, ...
They are the isotopes. Because of the difference in the number of neutrons by 2 they have been named that way.
There are many, in fact an infinite number, of answers. 257+0 256+1 258+(-1) . . . etc