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ranjitjat
May 19th, 2003, 06:01 PM
Which number should appear before the 18 ?


-------- 18, 20, 21,
22, 24, 25, 26,
27, 28, 30- - -

shivshikha
May 19th, 2003, 09:20 PM
the answer is 16...( All the prime numbers have been omitted, like 19, 23, 29...17 is a prime number hence we omit it)

ranjitjat
May 19th, 2003, 11:26 PM
SHIKHA- WELL DONE
100% correct- keep up
ANOTHER YALE GIRL ?