Three of these are wrong. Find the one that holds.
Read exercise and reference answers
- Questions
- Question
- Three of these statements about discount are false.
- Choices
- Item
- Marked price minus sale price
- Correct
- Yes
- Explanation
- Discount is worked out on the MARKED price.
- Item
- It is a percentage of the cost price
- Explanation
- It reduces the price, not raises it.
- Item
- It is added to the bill
- Explanation
- These are unrelated quantities.
- Item
- It equals the sales tax
- Question
- Three of these statements about compound interest are false.
- Choices
- Item
- Worked out on the previous year's amount
- Correct
- Yes
- Explanation
- It exceeds it once the base has grown.
- Item
- It always equals simple interest
- Explanation
- That describes SIMPLE interest.
- Item
- It uses the original principal every year
- Explanation
- Banks and post offices use it on deposits.
- Item
- It is charged only by shops
Each trap moves a rule onto the wrong price, which is exactly how these questions are set. Source: syllabus Maths, Ch 7 Comparing Quantities.