Q 25

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Q 25

by engg.manik » Tue Oct 13, 2009 7:00 am
25. The number of the members of a club is more than 10 and less than 40. When 3 people sit at a table, other people exactly divided to 4-people groups (4people sit at a table) or 5-people groups (5 people sit at a table). If the members are divided to 6-people groups, how many people will be left?

Answer is 5
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by 2010gmat » Tue Oct 13, 2009 10:20 am
the numer of members = l.cm of 4 and 5 + 3

= 23

6*3 = 18

23 - 18 = 5, therefore 5 people will be left