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Maths Puzzle
Numerical Ability
Suppose that the volume of a sphere is numerically equal to twice the surface area of the sphere. Find the length of a radius of the sphere.
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book Other Question
1. x+x-4+x-7=19
2. 3x+x-6=54
3. 40=2 (3x+4+x)
HELP
use long division to divide the following polynomials:
1) divide 3x^4-7x^2+2x-10 by x-3
2) divide 6x^4+20x^3+13x^2-5x+2 by 2x^2-1
3) divide 4x+y by 3x-2
4) divide x^3-11 by x^2