exam Maths Puzzle Numerical Ability

A calculator and a battery together sell for $21.00. The price of the calculator is $20 more than the price of the battery. Find the price of the calculator and the price of the battery.

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exam Other Question
A committe at your school is planning for graduation. You have been asked to research the cost of renting chairs for the ceremony. You do not yet know how many chairs you will need x/5 - x+2/3 = 1/15