exam Maths Puzzle Numerical Ability

An architect designs a house that is 12 m wide. The rafters holding up the roof are equal in length and meet at an angle of 70 degrees. The rafters extend 0.3 m beyond the supporting wall. How long are the rafters?

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exam Other Question

Subtract.

4x - 2x to the 2nd power + 4x to the 3rd power from
4x to the third power + x - 3x to the 2nd power
25y2z-15yz2
Im supposed to factor the expression completly. if its prime so indicate