Blog

Difficulty: Tricky

Ari was 10 on her last birthday, and will be 12 on her next birthday. How can this be true?

Lachlan was 8 on his last birthday, and will be 12 on his next birthday. How can this be true?

Scroll down or click for a hint, or the answer!

 

brain icon
 

Brainteaser hint

Both of these puzzles depend on their birthday dates.

For one of these puzzles, the date changes depending on when you read the puzzle!

brain icon

 

Brainteaser answer

Today is Ari’s birthday.

Lachlan’s birthday is on 29 February.

For more brainteasers and puzzles for kids, subscribe to Double Helix magazine!

Subscribe now! button

One response

  1. Laura Avatar
    Laura

    Lachlan was born on a leap year.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

By posting a comment you are agreeing to the Double Helix commenting guidelines.

Why choose the Double Helix magazine for your students?

Perfect for ages 8 – 14

Developed by experienced editors

Engaging and motivating

*84% of readers are more interested in science

Engaging students voice