exam Maths Puzzle Numerical Ability

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Solve the equation 4^2x+1=2^3x+6

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exam Other Question

The sum of the ages of Dorothy and Dorileen is 41. In 5 years, Dorothy will be twice as old as Dorileen. ind their age 3 years ago. True or False: it is possible to add a 3*3 matrix to a 3*5 matrix? thanks