exam Maths Puzzle Numerical Ability

a ladder that is 13m long is placed so that its foot it 3m from the base of a vertical wasll . how far does the laddr reach up the wall

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exam Other Question

Kindly solve this problem.
The measure of an angle is 20 less than the measure of its supplement. Find the measure of the angle, the measure of its supplement and the measure of its complement.
Solve this system of linear equations by graphing.

2x - y = 4
2x - y = 6