exam Maths Puzzle Numerical Ability

mary and sue are 30 miles apart. if they leave at the same time andride in the same direction, mary overtakes sue in 6 hours. if they ride towards each other they pass each other in 1 hour. what are their speeds?

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exam Other Question

A car travels at 40 km/h 30 minutes and 60 km/h for 15 minutes. How far does it travel in this time? Can you help with the following problems and thank you for your help.
1. -10 + (-3 - 5) =

2. 5 - (-8 + 7) =

3. (3 + -4) + 2 =

4. 9 + (3 - 7) =

5. 1 - (6 + 4)=