Level 3
Contestants in a quiz were awarded certificates based on their scores. A total of 312 points were awarded. 18 of the contestants received the Certificate of Distinction. 45 of the remaining contestants received the Merit Certificate and the rest received the Participation Certificate. How many contestants received the Certificate of Distinction?
5 m
Level 3
Alan, Bob and Ken had the same number of notes. Jan and Bob had a mix of $10-notes and $2-notes. Alan had 15 $10-notes while Bob had 20 $10-notes. Ken only had $10-notes.
  1. Who had the least amount of money?
  2. How much more did Alan have than Bob?
  3. Bob used all his $2 notes to buy a wallet. He then had $280 less than Ken. How many $10 notes did Ken have?
5 m