Choose a cateogry / subcategory of problems

Please find below all our categories and subcategories of problems available. Please choose one based on your level of experience. If you're not sure, you can contact our support line. Remember that you must be logged in, in order to be able to see the questions. You can also register with Facebook or Twitter, for free!

Chemistry problems

Problem category «Chemistry problems»

Access dozens of problems about atoms, molecules, cells, aluminium, iridium, protons, neutrons, electrons, charge magnitude, Avogadro's number, mass, unit cells, crystals, volumes of unit cells or other (..)

Engineering problems

Problem category «Engineering problems»

The Engineering section holds problems from the Civil Engineering area mainly, including reactions (vertical, horizontal), section properties, moments, first and second moment of area, elastic section (..)

Highway Code (UK)

This category contains information about the Highway Code implemented within United Kingdom and it reflects regulations implemented by DSA - Driving Standard Agency

Mathematical problems

Problem category «Mathematical problems»

Find problems about adding or subtracting values, algebra, GCSE, equations, negative values

Physics problems

Problem category «Physics problems»

Find problems about stress, strain, area, Young's modulus, elasticity, atoms or temperature