exam
Maths Puzzle
Numerical Ability
an airplane tooke 2 hours to fly 600 km against a head wind. The return trip with the wind took 1 2/3 hours. Find the speed of the plane in still air.
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exam Other Question
y=x+2
2x+y=11
Could someone please help me?
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)=