We need your help now

Support from readers like you keeps The Journal open.

You are visiting us because we have something you value. Independent, unbiased news that tells the truth. Advertising revenue goes some way to support our mission, but this year it has not been enough.

If you've seen value in our reporting, please contribute what you can, so we can continue to produce accurate and meaningful journalism. For everyone who needs it.

"Do you feel lucky? Well, do you?" Shutterstock/Fabio Balbi
laws of subtraction

Maths Week: Your Friday puzzle

Figure it out.

IT’S MATHS WEEK, and as is our annual tradition here, we’re setting you a puzzle a day with all answers published on the site on Sunday.

Get puzzling!


As a Friday treat, Mr Moneybags takes a bag full of money to let his workers have a lucky dip. He explains that there is a mix of €5, €10 and €20 notes in the bag and everyone could pull one note out.

You are that difficult worker who’s always asking questions and you ask him about the chances of winning each denomination.

You would have to pull out 31 notes to be sure of winning a €20 note. You would have to pull out 26 notes to be sure of winning a €10 note and if you pulled out 16 notes you would be sure to get a €5 note.

After a pause he declares. “I have changed my mind. I will give the entire bag of money to smartypants here if they can tell me how much is in it altogether. “

Can you figure out how much money is in the bag?

All answers will be published on on Sunday 

Try some of the previous puzzles >  

Readers like you are keeping these stories free for everyone...
A mix of advertising and supporting contributions helps keep paywalls away from valuable information like this article. Over 5,000 readers like you have already stepped up and support us with a monthly payment or a once-off donation.

Your Voice
Readers Comments
This is YOUR comments community. Stay civil, stay constructive, stay on topic. Please familiarise yourself with our comments policy here before taking part.
Leave a Comment
    Submit a report
    Please help us understand how this comment violates our community guidelines.
    Thank you for the feedback
    Your feedback has been sent to our team for review.

    Leave a commentcancel