Simple and Compound Interest Basics
10 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the formula for calculating simple interest?

  • Interest = Principal + Rate × Time
  • Interest = Principal × (1 + Rate)^(Time)
  • Interest = Principal × Rate + Time
  • Interest = Principal × Rate × Time (correct)

In the compound interest formula A = P (1 + r/n)^(nt), what does 'n' represent?

  • The total amount after interest is applied
  • The number of times interest is compounded per year (correct)
  • The principal amount of the investment
  • The number of years the money is invested

If $1,000 is invested at a 5% annual interest rate for 2 years using compound interest, compounded annually, what will be the future value?

  • $1,100
  • $1,110.25
  • $1,105
  • $1,102.50 (correct)

How does the frequency of compounding affect the future value of an investment?

<p>Increasing compounding frequency generally increases the future value. (D)</p> Signup and view all the answers

In the context of the compound interest formula, what does the variable 't' represent?

<p>The time period in years (D)</p> Signup and view all the answers

What is the future value of a principal amount of $5,000 invested at an annual interest rate of 6% compounded quarterly for 3 years?

<p>$6,000.00 (B)</p> Signup and view all the answers

How is compound interest different from simple interest?

<p>Compound interest accounts for interest on accumulated interest. (A)</p> Signup and view all the answers

Which formula represents the calculation of simple interest?

<p>Interest = Principal × Rate × Time (C)</p> Signup and view all the answers

For an investment of $2,000 at an annual interest rate of 4% for 5 years under simple interest, what is the total amount repayable?

<p>$2,400.00 (A)</p> Signup and view all the answers

What is the result of the calculation $1000(1 + 0.05/2)^{(2*2)}$?

<p>$1,103.81 (A)</p> Signup and view all the answers

Flashcards

Simple Interest Formula

Interest calculated only on the principal amount over a specific time period.

Compound Interest Calculation

Interest calculated on the principal plus accumulated interest from previous periods.

Compounding Frequency

How often interest is calculated and added to the principal.

Principal Investment Amount

The original amount of money invested or borrowed.

Signup and view all the flashcards

Future Value (Compound Interest)

The total amount accumulated over a period with compounding, considering both principal and accumulated interest.

Signup and view all the flashcards

Compound Interest

Interest calculated not only on the initial principal but also on accumulated interest from previous periods.

Signup and view all the flashcards

Simple Interest

Interest calculated only on the principal amount, not on accumulated interest.

Signup and view all the flashcards

Future Value (Compound)

The total amount accumulated after a certain amount of years with compound interest.

Signup and view all the flashcards

Compounding Frequency (n)

Number of times interest is calculated and added to the principal per year

Signup and view all the flashcards

Simple Interest Calculation

Calculated as: Interest = Principal × Rate × Time

Signup and view all the flashcards

Study Notes

Simple Interest Formula

  • Simple interest is calculated on the principal amount only.
  • The formula for simple interest is: Interest = Principal × Rate × Time
    • Where:
      • Principal: The initial amount of money
      • Rate: The interest rate (expressed as a decimal)
      • Time: The duration of the loan or investment (often in years)
  • Example: If you borrow $1,000 at an annual interest rate of 5% for 2 years, the simple interest would be calculated as follows:
    • Interest = $1,000 × 0.05 × 2 = $100
  • Total amount repayable = Principal + Interest

Compound Interest Calculation

  • Compound interest is calculated on the principal amount plus any accumulated interest.

  • It's calculated on the interest earned in previous periods.

  • The formula for compound interest is more complex and depends on whether interest is compounded annually, semi-annually, quarterly or monthly.

    • Generally, the formula for compound interest is:
      • A = P (1 + r/n)^(nt) where:
        • A = the future value of the investment/loan, including interest
        • P = the principal investment amount (the initial deposit or loan amount)
        • r = the annual interest rate (decimal)
        • n = the number of times that interest is compounded per year
        • t = the number of years the money is invested or borrowed for
  • Example: If you deposit $1000 in a savings account that pays an annual interest rate of 5% compounded annually for 2 years, the future value would be:

    • A = 1000(1+0.05/1)^(1*2) ≈ $1102.50
  • To show that compounding increases the return, note that the simple interest would be $100 for this example - a significant difference

  • Important Considerations for Compound Interest Calculation

    • Frequency of compounding matters: The more frequent the compounding (e.g., daily, monthly), the higher the future value will be.
    • Number of compounding periods: The calculation considers the number of times per year interest is compounded (e.g., annual compounding (n = 1), semi-annual compounding (n = 2)).
    • Calculating Compound Interest for Different Compounding Periods
      • If interest is compounded semi-annually, use 0.05/2 as r and 2n as the compounding frequency, etc
  • Example with semi-annual compounding: Consider a principal of $1000, an annual interest rate of 5%, and a time period of 2 years, compounded semi-annually.

    • A = $1000(1 + 0.05/2)^(2*2) = 1000(1.025)^4 ≈ $1103.81
  • Key Differences between Simple and Compound Interest

    • Simple interest only calculates interest on the principal amount.
    • Compound interest calculates interest on the principal and on the accumulated interest of previous periods.
    • Compound interest generally yields a higher return than simple interest over the long term, especially with longer periods.

Sample Question - Compound Interest:

  • A principal of $5,000 is invested at an annual interest rate of 6% compounded quarterly for 3 years.

    • Calculate the future value of the investment at the end of the 3-year period.
  • Solution:

    • P = 5000

    • r = 0.06

    • n = 4 (quarterly compounding)

    • t = 3

    • Future value A = 5000 (1 + 0.06/4)^(4*3)

    • A = 5000 * (1.015)^12

    • A ≈ $6000.00

Sample Question - Simple Interest

  • A borrower takes out a loan of $2,000 at an annual interest rate of 4% for a period of 5 years. Calculate the total amount repayable in simple interest.

  • Solution:

    • Principal = $2000
    • Rate = 4% (0.04)
    • Time = 5 years
    • Interest = PRT = 20000.045 = $400
    • Total amount repayable = $2,000 + $400 = $2,400

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

Explore the fundamental concepts of simple and compound interest with clear formulas and practical examples. This quiz covers the calculations for both types, helping you understand how interest is accrued over time. Perfect for students learning finance principles.

More Like This

Finance 1: Simple and Compound Interest
8 questions
Finance: Simple and Compound Interest
13 questions
Finance: Simple vs Compound Interest
5 questions
Use Quizgecko on...
Browser
Browser