exam Maths Puzzle Numerical Ability

find greatest number of four digits which when divided by 3,5,7,9 leaves remainder 1,3,5,7 respectively

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exam Other Question

Angela needs 20 quarts of 50% antifreeze solution in her radiator. She plans to obtain this by mixing some pure antifreeze with an appropriate amount of a 40% antifreeze solution. How many quarts of each should she use? COMPARE RATIONAL NUMBERS USING SYMBOLS (i.e., <,> = the greater than sign w/ a line under it and the less than sign w/ a line under it) and position on a number line