Try this What was the Starting Number? KS2 Test Practice and help your class get to grips with using the inverse operation in a SATs-style question. This specific question is based on question 13 from the 2016 Reasoning KS2 Paper 3. The resource has been six ways, and includes using two-step, three-step and four-step problems, so your whole class can access it. Each of the resources contains 12 questions, so there's plenty of opportunity for your children to practice. An answer sheet has been provided to help save you some time.