exam Maths Puzzle Numerical Ability

two angles of a triangle are 47 degrees and 74 degrees. what is the other?

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exam Other Question

Can someone please help me solve this ?
Determine a quadratic equation with integer coefficients that has roots -1+-4sqrt2/2 .
Will someone please help me solve this equation? The problem states to perform the indicated operation and simplify: 3/4x=2/3/5/6x-3/4