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Unit 6: Rate times time, then compound

Simple interest

Read this before the quizzes

Interest is rent on money

Months and years

Finding the rate, the time or the sum

Find the rate

Months

Answers and why: simple interest

Compound interest

Interest on interest

Half-yearly and quarterly

How much more is compound than simple?

Half-yearly

The gap

Answers and why: compound interest

Growth, depreciation and instalments

Growth and depreciation are multipliers

Working back

Equal instalments

Growth

Reverse depreciation

Instalments

Answers and why: growth and instalments

Partnership

Money times time

Partners who join or change

Money and time

A partner joins

Answers and why: partnership

Word problems, slips and formula cards

Interest in word problems

Ten slips to watch for

The formula cards

Your pace for this unit

Your mission: compare offers in money

Borrow and lend

Principal from CI

Answers and why: word problems and slips

Self-check: can you do it?

Interest and money problems. This unit has one move: rate times time, then compound.

Quantitative Aptitude Unit 6: Interest and money problems

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