exam Maths Puzzle Numerical Ability

Find the midpoint between the points (7, -7) and (-3, -3).

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exam Other Question

Sam earned $42,000 in selling antiques. He invested part at 15% simple interest and the rest at 12%, earning $5790 per year in interest. How much did he invest at each rate? Two cars leave City A at the same time to travel to city B. One car travels at 72 km/h and other at 78 km/h. If the slower car arrives 20 min. after the faster car, how far apart are City A and City B?