exam Maths Puzzle Numerical Ability

Adult tickets for a play cost $4 and child tickets cost $1. If there were 23 people at a performance and the theater collected $80 from ticket sales, how many children attended the play?

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exam Other Question

Wendy, a loan officer at a bank, has 1,000,000 dollars to lend and is required to obtain an average return of 18% per year. If she can lend at the rate of 19% or at the rate of 16%, how much can she lend at the 16% and still meet her requirement? Please help with (9a/4b)^0. Is it 9a/4b or 1?