There's no need to switch names.
There's no need to post the same question/problem several times.
You also need to indicate what YOU have done so far to solve your problems. Then a tutor might be better able to help you.
what percent of the two digit whole numbers are primes ?1.21 2.23 3.25 4.29? explain the ans
2 answers
Continue from where you left off when you were "dany"
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http://www.jiskha.com/display.cgi?id=1468749031