exam Maths Puzzle Numerical Ability

Desa invested a certain amount of money at 4% interest and $1500 more than that amount at 7%. Her total yearly interest was $435. How much did she invest at each rate?

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Mary Sue wants to know if there is a connection between attendance at craft fairs and the number of exhibitors who have booths at the fair. For a random s You have 100 square meters of material. Which will hold more volume, a sphere or a cube made from that much material? How much more? Thank you Nick.