exam
Maths Puzzle
Numerical Ability
Use cross products to determine whether each of pair of ratios forms a proportion:
4/9, 12/27
Please explain how to solve this problem.
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exam Other Question
The length of a rectangle is 2ft less than three times the width of the triangle. The area of the rectangle is 65ft2. Find the length and width of the rectangle.
If A is a 5 × 5 matrix, then AI^-1 =
a. A^-1
b. I
c. A
d. A^-1 I