Year 1 Reasoning: maths mastery For those who teach or have children following the mastery programmes then our Year 1 Reasoning category is a superb resource. Our latest sets of worksheets look at reasoning and problem solving with a small amount of money: just 10p. For the ‘10p to spend’ questions there are a number of different answers and children should be encouraged to find as many as possible. Go to Year 1 Reasoning/Problem Solving