Working systematically

Can you arrange 5 different digits (from 0 - 9) in the cross in the way described?

Make a pair of cubes that can be moved to show all the days of the month from the 1st to the 31st.

Find all the different shapes that can be made by joining five equilateral triangles edge to edge.

Alice's mum needs to go to each child's house just once and then back home again. How many different routes are there? Use the information to find out how long each road is on the route she took.

In a bowl there are 4 Chocolates, 3 Jellies and 5 Mints. Find a way to share the sweets between the three children so they each get the kind they like. Is there more than one way to do it?

A Sudoku that uses transformations as supporting clues.

A Sudoku with a twist.

You have been given nine weights, one of which is slightly heavier than the rest. Can you work out which weight is heavier in just two weighings of the balance?

This Sudoku problem consists of a pair of linked standard Suduko puzzles each with some starting digits

How many 10-digit numbers containing only 1s, 2s and 3s can you write?