Development of Combinatorial Thinking Ability Questions for Students Journal title: International Journal of Current Science Research and Review Authors: Eric Dwi Putra, Slamin ., Arika Indah Kristiana, Abi Suwito, Subject(s): Agricultural Science, Plant Sciences, Economic Development, Technological Change and Growth, Medical Education , Business, Commercial, Consumer and Financial Law, Mathematical Modelling and Industrial Mathematics, Philosophy of the Social Sciences, Humanities, Multidisciplinary, Psychology, Multidisciplinary, Engineering, Multidisciplinary, Materials Science, Multidisciplinary