About This Set
These questions are a step up, closer to Tier 2. Most need a careful setup before any arithmetic: a three-candidate election, savings when income and spending rise by different amounts, population with births and deaths, or a percentage of a percentage. The ones marked [Tier 2] use ideas that only Tier 2 tests, so if Tier 1 is your only target you can leave them for later. Allow about 30 minutes for the set and read the explanations only at the end. With 18 or more right, you can move on to the PYQ sets.