book Maths Puzzle Numerical Ability

The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 42 inches long, how long is the spoke? round your answer the t

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Hazel has $2.40 in nickels, dimes and quarters. She has twice as many nickels as quarters, and twice as many quarters as dimes. How many of each type does she have? solve the equation: |0.1x - 0.2| = |0.2x - 0.4|