1) Jo adds up all the positive integers from 1 to 50. Kate does a similar thing with the first 50 integers; however, she first rounds every integer to its nearest multiple of ten (rounding 5's up) and then adds the 50 values. What's the positive difference between their sum?
2)The sequence 2,3,5,6,7,10,11 . . . contains all the positive integers from least to greatest that are nether squares nor cubes. What is the 400th therm of the sequence?
2007-02-05
17:29:31
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2 answers
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asked by
cfishot
2