top button
Flag Notify
Connect to us
    Facebook Login
    Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

How can you get a fair coin toss if someone hands you a coin that is weighted to come up heads more often than tails?

0 votes
269 views
posted May 20, 2014 by Salil Agrawal

Share this puzzle
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

2 Solutions

0 votes

We should use tails on top while flipping always !!!

solution Jan 15, 2016 by Tejas Naik
0 votes

If you know that it's weighted to come up heads more often than tails, then it's simply a matter of tossing the coin 'bout a hundred times and figure out the "weighted" average of heads versus tails.

So the answer is (just like the stock market): Foreknowledge.

solution Oct 9, 2016 by George Davros



Similar Puzzles
0 votes

You are going to flip 8 fair coins in total and three of the first four have already landed tails. What do you expect the total count of tails to be when you're finished flipping all 8 coins?

0 votes

Spiderman has two girlfriends, Mary Jane & Gwen Stacy. After completing every mission, he rushes to the central subway. Since spidey is a nice man, much impartial, he takes which-ever train arrives first. From subway, one series go towards Mary's place, and another series move towards Stacy. Trains from either series appear every 10 minutes. Also, Peter Parker sticks with the train which arrives first.
But somehow, he notices that he is spending 9 times more dates with Mary Jane than Stacy. Can you explain why?

0 votes

Two men find an old gold coin and want to have a coin toss with it to decide who gets it. The only problem is the coin is heavier on one side so it comes up heads more than tails.

What is a fair way for the men to toss the coin and decide who gets the coin?

+1 vote

A number more than 1200 and less than 1300 is such that all its digits except one digit are factor of 9.
What is the probability that number is more than 1250 ?

0 votes

Upon tossing a fair coin five times, you get heads every time. What is the probability that in the next toss, it will land with tail?

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#470/147, 3rd Floor, 5th Main,
HSR Layout Sector 7,
Bangalore - 560102,
Karnataka INDIA.
QUERY HOME
...