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A sheet of paper has statements number from 1 to 1.for all values of n from 1 to 10

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There is magic dragon with 3 heads & 3 tails....u have a magic sword tht can cut 1 head,2 heads , 1 tail & 2 tails...if 1 head is cut another head grows...if 1 tail is cut 2 new tails grow...2 tails are cut a new head grows...& if 2 heads r cut nothing grows...find minimium number of swings 2 cut all heads & tails...
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?