exam Maths Puzzle Numerical Ability

the length of a rectangular field is 75yd.This is 3yd more than twice the width.how wide is the field??

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exam Other Question

When solving the following system of equations by the Gaussian elimination method,

x-3y-2z +5
2x-y +3z =15
4x-4y+9z =40

which of the following is NOT a matrix leading t square root 5 divided by 2 + square root 5