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Maths Puzzle
Numerical Ability
63 - 12 + 4 x 3 =
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melinda's dad is 30 years older than melinda now. eight years ago, his age was equal to the square of melinda's age then. how old is melinda?
Fifty kilograms of a cement-sand mixture is 40% sand. How many kilograms of sand must be added for the resulting mixture to be 60% sand?