Worksheets: compound interestReal numbers · high school

A quiz in groups or a practice sheet on “Compound interest” - with an answer key, ready to print, free. You can combine it with other sections.

Build a sheet

40+: curriculum sections
200+: topics
700+: question types

Answer key · group A · for the teacher · sheet no. 204 517

Compound interest

1.9 870 zł47 000 · 1.1² = 56 870 ;56 870 − 47 000 = 9 870

2.147 005.16 zł120 000 · 1.07 = 128 400, 128 400 · 1.07 = 137 388, 137 388 · 1.07 = 147 005.16

3.12%32 614.40 : 26 000 = 1.2544 ;1.12 · 1.12 = 1.2544 ;1.12 − 1 = 0.12 = 12%

4.37 856 zł8% : 2 = 4% ;1 · 2 = 2 ;35 000 · 1.04² = 37 856

5.25 077.60 zł21 500 · 1.08 = 23 220, 23 220 · 1.08 = 25 077.60

Maths worksheets · phiboard.com

Answer key

Quiz

Compound interest

GroupAB

Name Date Score / 18

1.A company took out a loan of 41 000 zloty for 3 years. The interest is 7% a year, compounded annually, and the company will repay the whole debt in one payment at the end. How many zloty of interest will the company pay? Give the answer to the nearest grosz.(3 pt)

2.13 500 zloty was deposited at 8% a year, compounded annually. How many zloty will be in the account after 2 years?(3 pt)

3.The value of an investment grew every year by the same percentage. At the start it was 29 000 zloty, and after 2 years it was 35 090 zloty. By what percentage did it grow each year?(3 pt)

4.A company took out a loan of 31 000 zloty for 3 years. The interest is 6% a year, compounded annually, and the company will repay the whole debt in one payment at the end. How many zloty of interest will the company pay? Give the answer to the nearest grosz.(3 pt)

Maths worksheets · phiboard.com

Group B

Quiz

Compound interest

GroupAB

Name Date Score / 18

1.A company took out a loan of 47 000 zloty for 2 years. The interest is 10% a year, compounded annually, and the company will repay the whole debt in one payment at the end. How many zloty of interest will the company pay? Give the answer to the nearest grosz.(3 pt)

2.120 000 zloty was deposited at 7% a year, compounded annually. How many zloty will be in the account after 3 years?(3 pt)

3.The value of an investment grew every year by the same percentage. At the start it was 26 000 zloty, and after 2 years it was 32 614.40 zloty. By what percentage did it grow each year?(3 pt)

4.35 000 zloty was put on deposit for 1 year. The interest rate is 8% a year, compounded half-yearly. Ignore the tax on interest. How many zloty will be on the deposit after that time? Give the answer to the nearest grosz.(3 pt)

Maths worksheets · phiboard.com

Group A

Sheet settings

Quiz6 questions2 groups1 topic

Sheet no.204 517The number is only shown here and on the answer key - never on the student sheet. The same number with the same topics gives the same sheet.

answer key at the endall groups

Quiz

Compound interest

GroupAB

Name Date Score / 18

2.120 000 zloty was deposited at 7% a year, compounded annually. How many zloty will be in the account after 3 years?(3 pt)

3.The value of an investment grew every year by the same percentage. At the start it was 26 000 zloty, and after 2 years it was 32 614.40 zloty. By what percentage did it grow each year?(3 pt)

5.21 500 zloty was deposited at 8% a year, compounded annually. How many zloty will be in the account after 2 years?(3 pt)

6.The value of an investment grew every year by the same percentage. At the start it was 2 000 zloty, and after 3 years it was 3 456 zloty. By what percentage did it grow each year?(3 pt)

Maths worksheets · phiboard.compage 10 of 10

Answer key · group A · for the teacher · sheet no. 204 517

Compound interest

1.9 870 zł47 000 · 1.1² = 56 870 ;56 870 − 47 000 = 9 870

2.147 005.16 zł120 000 · 1.07 = 128 400, 128 400 · 1.07 = 137 388, 137 388 · 1.07 = 147 005.16

3.12%32 614.40 : 26 000 = 1.2544 ;1.12 · 1.12 = 1.2544 ;1.12 − 1 = 0.12 = 12%

4.37 856 zł8% : 2 = 4% ;1 · 2 = 2 ;35 000 · 1.04² = 37 856

5.25 077.60 zł21 500 · 1.08 = 23 220, 23 220 · 1.08 = 25 077.60

6.20%3 456 : 2 000 = 1.728 ;1.2 · 1.2 · 1.2 = 1.728 ;1.2 − 1 = 0.2 = 20%

The method lists the solution steps - handy when going through the sheet with the class.

Maths worksheets · phiboard.comsheet no. 999 999 · answer key, page 10 of 10

Quiz

Compound interest

GroupAB

Name Date Score / 18

2.13 500 zloty was deposited at 8% a year, compounded annually. How many zloty will be in the account after 2 years?(3 pt)

3.The value of an investment grew every year by the same percentage. At the start it was 29 000 zloty, and after 2 years it was 35 090 zloty. By what percentage did it grow each year?(3 pt)

5.20 000 zloty was deposited at 5% a year, compounded annually. How many zloty will be in the account after 3 years?(3 pt)

6.The value of an investment grew every year by the same percentage. At the start it was 1 000 zloty, and after 2 years it was 1 322.50 zloty. By what percentage did it grow each year?(3 pt)

Maths worksheets · phiboard.compage 10 of 10

Answer key · group B · for the teacher · sheet no. 204 517

Compound interest

1.9 226.76 zł41 000 · 1.07³ ≈ 50 226.76 ;50 226.76 − 41 000 = 9 226.76

2.15 746.40 zł13 500 · 1.08 = 14 580, 14 580 · 1.08 = 15 746.40

3.10%35 090 : 29 000 = 1.21 ;1.1 · 1.1 = 1.21 ;1.1 − 1 = 0.1 = 10%

4.5 921.50 zł31 000 · 1.06³ ≈ 36 921.50 ;36 921.50 − 31 000 = 5 921.50

5.23 152.50 zł20 000 · 1.05 = 21 000, 21 000 · 1.05 = 22 050, 22 050 · 1.05 = 23 152.50

6.15%1 322.50 : 1 000 = 1.3225 ;1.15 · 1.15 = 1.3225 ;1.15 − 1 = 0.15 = 15%

The method lists the solution steps - handy when going through the sheet with the class.

Maths worksheets · phiboard.comsheet no. 999 999 · answer key, page 10 of 10

What goes on the sheet: compound interest

The generator draws questions from 3 question types in this topic. Every quiz group gets the same types in the same order, only with different numbers, and a practice sheet goes from easier to harder.

Compound interest
Compound interest: deposits and loans
Interest rate from the initial and final amounts

What the section covers in the curriculum: number sets and set operations, intervals, equations with absolute value, divisibility and remainders, powers with integer and rational exponents, roots of any degree, logarithms, compound interest

Students can also practise online - the same question types, with step-by-step solutions: Exercises: compound interest →

Worksheets for every section

Every section of the Polish maths curriculum - primary and high school. Each section and topic has its own page with a ready-to-print sheet.

I6 topics

Every question type has a test that recomputes the answer and every solution step.

Curriculum-based

Sections follow the Polish core curriculum: grades 4-6, grades 7-8 and high school.

No copying between groups

The same question types and difficulty, different numbers in each group.

No sign-up needed

The sheet and the answer key are made right in your browser.