Personal Links
Browse Teasers
Search Teasers

## For The Love of Calculators!

Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.

 Puzzle ID: #45221 Fun: (2.69) Difficulty: (2.02) Category: Probability Submitted By: Fhqwhgads

Little Billy has a calculator with 15 buttons. He has 10 keys for 0-9, a key for addition, multiplication, division, and subtraction. Finally, he has an = sign. However, Mark the Meanie messed up the programming on Billy's calculator. Now, whenever Billy presses any of the number keys, it comes up with a random single-digit number. The same goes for the four operations keys (+,-,x, /). So whenever Billy tries to press the + button, the calculator chooses randomly between addition, multiplication, subtraction, and division. The only key left untouched was the = sign.

Now, if Billy were to press one number key, one operation key, then another number key, then the = button, what are the chances the answer comes out to 6?

## What Next?

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

## Comments

Back to Top

###### Online Now
5 users and 616 guests

autumn
###### Follow Braingle!
Tap into all 20,000+ of our brain teasers, riddles and puzzles on your iPhone or iPad.
Copyright © 1999-2017 | FAQ | Braingle Time: 9:00 am