exam Maths Puzzle Numerical Ability

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Gary and Lynn found that the larger number was 2 greater than 4 times the smaller number. Also,the larger number was 6 less than 8 times the smaller number. What were the two numbers?

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A tank contains 50 gallons of a 40% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to obtain a 50% solution? 10. Use the following table to answer the question.
Population of Europe by Age Groups
Population (in thousands)
1950 1970 1995
Age 0-14 143,175 166,367 139,464
Age