exam Maths Puzzle Numerical Ability

Sales tax varies directly with the cost of an item. If you pay a $6 sales tax on a $150 coat, what is the sales tax on a $45 pair of shoes?

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exam Other Question

At noon a horse and buggyheaded north traveling 10 miles per hour. Two hours later, a roadster headed south from the same location driving 50 miles per hour. At which time will the horse and buggy be 140 miles from the roadster? a newsagent buys 100 overseas magazines and pays $100 for them. He buys American magazines for $10, British for $5 and comics for 50 cents each how many of each does he buy?

thank you so much really appreciate your help