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Right before the bell rings, Jeri’s teacher throws up a problem on the board: “I’m thinking of a number. When I add its digits together and multiply by seven, I get the number I first thought of. The number is under 40.” Can you help Jeri find the number before class is dismissed?

Can you solve this grid-based logic puzzle about NASA? You are doing a science project about four of NASA’s spacecraft: Clipper, DAVINCI, Dragonfly and MAVEN. Each spacecraft will visit another planet in the solar system: Venus, Mars, Jupiter and Saturn. They also have different launch dates: 2013, 2024, 2028 and 2030.

A team of geologists are using the latest technology to drill into the Earth’s ocean floor and look at the rock underneath! They manage to drill a total of 1250 metres (based on a recent true story!). But the drilling gets harder the deeper they get.

Eight people come together for a very important meeting. How many ways can just one person sit in the wrong chair?

It’s happened to all of us – the computer program you’re using starts thinking and won’t respond. Sometimes, you just need to wait for it to finish what it’s doing. But other times, it’s stuck in a loop and it’ll never recover. So is it time to press the reset button?

In this puzzle, each Aussie animal stands for a number. Each animal represents the same number throughout the puzzle. Can you use the first three mathematical equations to figure out the answer to the last equation?

A team of engineers have invented a new, stretchy battery that is clear. Another team have invented a jelly-like battery that is rainbow coloured. Both teams want to compare how long their batteries last to a regular, silver AA battery.

These grid-based logic problems require Sherlock-like deduction! We’ll take you through the basics of solving these tricky word puzzles.

Lavonne is a security guard who has to walk around the outside of an L-shaped building. She knows the length of the longest sides, 200 metres and 140 metres. She also knows the shape of the building and that each of the angles are 90 degrees. What is the building’s perimeter?

One day, Rumi’s chess club coach asks her, “how many squares are on a chess board?” Rumi replies, “That’s easy, the board is 8 by 8, so there are 64 squares!” Her coach smiles, “What about the larger squares made up of smaller squares? The board is an 8 by 8 square after all!” How many squares are on a chess board?