I am an odd number

I am an odd number. Take away a letter and I become even. What number am I?




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John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

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Can you find the least possible number such that

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Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

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A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
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A mules travels the same distance daily.
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Obviously two mules legs cannot be a 2km ahead of the other 2.

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Can you find out which number multiplied by itself will give the output as 12345678987654321?

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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki