Classwork Ruby

Question 1

Sami invested $400 for 2 years at 5% per year simple interest.
Work out the total interest Sami gets.

Principal = $400

Rate = 5%

Time = 2 years

1. Circle Principal, Rate & Time
2. Check what the question wants! Underline.
3. If SI use SI = PRT
4. If Total In CI use CI = P(1+R)^T

Question 2

Carolyn invested $700 for 3 years at 2% per annum simple
interest. Work out the total amount of interest Carolyn earned.

Question 3

Natalie invests $600 for 2 years at 10% per year compound
interest. How much money does she earn at the end of 2 years?

P = $600 Rate = _________ Time = _______

1. Circle Principal, Rate & Time
2. Check what the question wants! Underline.
3. If SI use SI = PRT
4. If Total In CI use CI = P(1+R)^T

Question 4

Harry invests $800 for 2 years at a rate of 3% per year
compound interest.

Calculate the amount of interest he receives at the end of the 2
years. (Q19, 0580/13 M/J 2018)

P = ________ R = ________ Time = _______

1. Circle Principal, Rate & Time
2. Check what the question wants! Underline.
3. If SI use SI = PRT
4. If Total In CI use CI = P(1+R)^T

Question 5

Samit invests $1800 at a rate of 4.5% per year simple interest.
Work out the value of his investment at the end of 4 years.
(Q12, 0580/12 O/N 2018)

1. Circle Principal, Rate & Time
2. Check what the question wants! Underline.
3. If SI use SI = PRT
4. If Total In CI use CI = P(1+R)^T

Since the question is asking at the end of
4 years, you need to add SI to Principal