January 2016 Logic & Maths Problems – Solutions
1. Alex is 10, Bill is 5, Charlie is 9
2. Losing
(eg start with $1000. It will decrease to $900, then increase to $990)
3. $8.70
4. 15
5. 150 km
6. Shape d. Shapes a, b and c are rotations of each other; d is a non-superimposable mirror image.
7. 500 litres (actually about 524)
8. 4 cubes
9. 8
10. 24 minutes