Question

Four tests Physics, Chemistry, Mathematics and Biology are to be conducted on four consecutive days, not necessarily in the same order. The Physics test is held before the test which is conducted after Biology. Chemistry is conducted exactly after two tests are held. Which is the last test held?

Answer 1

As the Physics test is held before the test which is conducted after the Biology and Chemistry is conducted exactly after two tests are held then the third test will be chemistry.

Now it means that physics and biology has to be the first and second test that comes before chemistry.

So, the last test remains is Mathematics.

Answer 2

Since physics is held before the subject that follows it means iin between biology and physics there is another subject which is either mathematics or chemistry

If chemistry is conducted after two tests are done means it has to be between physics and another subject which i suppose is mathematics

So the order is biology ,mathematics ,chemistry then physics