Others Maths Puzzle

Use the digits 6,5,4,3,2 and 1 once only, in this multiplication question to make it correct.

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Others Other Question

Hercules goes to fight Hydra,the monster that currently has 200 heads.However,every time hercules kills some of hydra's heads the remaining heads double in number.So,if hercules kills one head right now,the number of heads will become 1999*2=3998.In order to fight the hydra,Hercules decides to double the number of arrows he has got each timehe kills hydra's heads.Presently,he has only one arrow and a single arrow can kill only one head of hydra.If hercules starts attacking the hydra once every minute and if everytime he attacks he uses all the arrows that he has,after how many minutes will he be able to finish all of hydra's heads?
(a)4000 mins
(b)2000 mins
(c)1999 mins
(d)hercules should give up hope of killing the hydra
Find the next two numbers in this series?

101, 112, 131, 415, 161, 718, ???, ???