Resource White Rose Maths Hub: These booklets each contain over 40 reasoning and problem solving questions suitable for KS1, KS2 and KS3 classes. The answers are provided with some simple notes at the back of the booklet and for some problems supplementary questions and variation has been provided.
Website PUZZLEBOXX is a collection of puzzles and problems suitable for children (aged 9 & upwards) and adults. Some are fairly simple. Others may take some time. Some require pencil and paper. Others may require a practical solution. Almost all of them will be easier to solve if you discuss your ideas with a partner.