What shapes can be made by folding an A4 sheet of paper only once?
Can you picture how to order the cards to reproduce Charlie's card trick for yourself?
What is the first term of a Fibonacci sequence whose second term is 4 and fifth term is 22?
Given a 2 by 2 by 2 skeletal cube with one route 'down' the cube. How many routes are there from A to B?
Draw all the possible distinct triangles on a 4 × 4 dotty grid. Convince me that you have all possible triangles.
Blue Flibbins are so jealous of their red partners that they will not leave them on their own with any other bue Flibbin. What is the quickest way of getting the five pairs of Flibbins safely to the new planet?
A card with the letter N on it is rotated through two different axes. What does the card look like at the end?
A 1×2×3 block is placed on an 8×8 board and rolled several times.... How many squares has it occupied altogether?
Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.
