By Fiona Midson, 22 February 2023
It’s time to be irrational and celebrate π (Pi) Day! Will you slice up this quiz and get 5/5 or are you going to eat humble pie?
Categories:
By David Shaw, 15 February 2023
Difficulty: Fun Jane has some Australian silver coins in her pocket. When buying an apple, she realises she has more than $1 in silver coins, but can’t make exactly $1 with her coins. How is this possible? (Silver Australian coins come in 5c, 10c, 20c, and 50c.)
By Elizabeth Thomsen, 5 January 2023
Difficulty: Fun While Eddie is away on holidays his swimming pool has a leak. Each day it loses half the water still in the pool. Normally, it’s 1.6 metres deep, but when Eddie gets home there is only 10 centimetres of water in the bottom. How long has the pool been leaking?
By Elizabeth Thomsen, 5 December 2022
Santa sent out 2 sleigh teams. One goes east, and the other goes west, until they meet. how far away from home are they when they meet?
By Elizabeth Thomsen, 24 November 2022
Three new chocolate brands are being released: Jupiter, Astro, and Celeste. can you use up all the ingredients to make these bars?
By Elizabeth Thomsen, 9 November 2022
Difficulty: Tricky A new class of aliens is due to start at Alien Academy. The teachers need to know the age of each alien, but can’t contact them. Luckily, they have a few clues to help them. There are five aliens (Filp, Agg, Nim, Phod, and Mex) and each alien is a different age (7, […]
By David Shaw, 19 October 2022
Difficulty: Tricky There are 4 houses that stand in a row. One family lives in each house. The O’Connells live next door to the Taos, but they don’t live next door to the Sosas. The Prasads don’t live next door to the Sosas. Who lives next door to the Prasads?
By David Shaw, 6 October 2022
Difficulty: Extreme! Nguyệt keeps a bread dough in her fridge. She tends to it so that every day it doubles in size, and then every morning, she cuts off enough dough to make one loaf of bread for her breakfast.
By David Shaw, 23 September 2022
Difficulty: Fun On my bookshelf, my favourite book is the third from the left, and it’s the seventh from the right. How many books are there on that shelf?
By David Shaw, 7 September 2022
Folding origami cranes and paper aeroplanes is fun, but they tend to be made of straight lines. So what happens when you fold in curves?
12 months, 8 issues
Print & digital subscriptions available.
Sign up to our Double Helix newsletter
Stay in touch with new updates by signing up to our free newsletter
Perfect for ages 8 – 14
Developed by experienced editors
Engaging and motivating
*84% of readers are more interested in science
Engaging students voice