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What is Bitcoin and how Bitcoin work

What is bitcoin?? Bitcoin is like a simple coin that we see in our daily life but it does not exist physically , Bitcoin is like virtual banking currency of the internet, Bitcoin are known as cryptocurrency,b Bitcoin is a form of digital money that is created by mathematical computation and these are policed by miners, miners are nothing  but these are computers, How Bitcoin works?? Bitcoin is  like  a like a good coin that you have ,bitcoins are completely virtual coins these are designed to be self contained for their value with no need for bank, like gold coin Bitcoin can also be used for purchasing anything from internet,b bitcoins are traded from wallet to wallet, there are special typr of wallet for bitcoins, You can exchange money for your Bitcoin or you can also tuck them away and sell after sometime becuase its price generally increase by time, so you can make profit by bitcoins, bitcoins was first used by theives who wanted to take money from.one...

toughest problem of time speed and distance for cat

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Solution:-

Two circles are touching such that they have common tangent

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Hard problem for CAT

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How to find mirror image of a point in a straight line

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Sum of infinite series

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Hard question on area of triangle and similarity

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Hard question on rectangle