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Find the value of (x^3 – y^3) / (x^2 + xy + y^2).
Ax+y
Bx-y
Cx^2+y^2
Dxy
If a triangle has a base of 10cm and an area of 50cm², its height is:
A5cm
B10cm
C15cm
D20cm
What is the next number in the series: 5, 10, 20, 40, …?
A50
B60
C70
D80
A boat travels at 10 km/h in still water. If the current is 2 km/h, the speed downstream is:
A8 km/h
B10 km/h
C12 km/h
D20 km/h