Advanced Mathematics Competition
Year 3 and Year 4
Javi was buying a set of headphones. The cost was seventy dollars. He gave the attendant what he thought were two $50 notes, (actually two $100 notes). The sales assistant was sleepy and didn't notice either, so he gave Javi what he thought were three $10 notes (actually three $50 notes).
Who ended up better off than they should?
1, 2, 3, 1, 4, 9, 1, *, 27
What is the value of '*' in the number pattern above?
Joe counts 48 heads and 134 legs among the ducks and pigs on his farm. How many pigs and how many ducks does he have?