Special maths question | most difficult question in maths

An instructor has a test bank consisting of 300 easy True/False questions, 200 difficult True/False questions, 500 easy multiple choice questions (MCQ) and 400 difficult multiple choice questions. If a questions is selected at random from the test bank, what is the probability that it will be an easy question given that it is a multiple choice question.

Which year had the second most difficult exam?

The compound that is most difficult protonate is

The ion most difficult to removes as precipitate is

The animal most useful on difficult terrains is

Laura can solve 6 math questions in 12 minutes. Working at the same rate, how many minutes would it take Laura to solve 5 math questions?

Differentiation most important question