exam
Maths Puzzle
Numerical Ability
Solve (1/81)^t = 243^t-2.
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exam Other Question
page 43 Chap.7.3
You have $160 and save $7 per week. Your friend has $210 and saves $5 per week. After how many weeks will each of you have saved the same amount of money?
multiply in the vertical method
(2r - 3s) (4rē+ 6rs +9sē)