Grade 10

Joseph invests R18 000 and it grows to R25 000 over a period of 2 years. Calculate the interest rate to 1 decimal place if the investment earned compound interest?

• 15%

• 17,9%

• 16,2%

• 19,5%

Vanessa buys a laptop that costs R16 000. She pays a 10% deposit and then takes out a 24 month hire-purchase loan on the balance. Calculate her monthly payments.

• R1000

• R925

• R864

• R845

Vanessa buys a laptop that costs R16 000. She pays a 10% deposit and then takes out a 24 month hire-purchase loan on the balance. Calculate what she will actually pay for the laptop.

• R22 336

• R24 000

• R18 000

• R25 389

Mike buys a mobile phone costing R8 000 on HP, pays a deposit of R800 and then pays 36 monthly payments of R344. Calculate the simple interest rate.

• 24%

• 26%

• 20%

• 18%

The average salary of a computer programmer in South Africa in 1995 was R4 500. Assuming an average rate of inflation of 6,1%, would a salary of R9 000 have the same buying power in 2015?

• A salary of R9 000 would be way above the buying power of a salary of R16 789,21

• A salary of R9 000 would be way below the buying power of a salary of R14 706,87

• A salary of R9 000 would be way below the buying power of a salary of R18 166,78

• A salary of R9 000 would be way above the buying power of a salary of R14 706,87

What does the 5 number summary consist of?

• Lower and Upper Quartile

• Median

• Min and Max

• mean

• mode

What are the 3 most popular ways of representing ungrouped data?

• Frequency tables

• Bar graphs

• Stem and leaf

• Range

• Domain

What is the symbol for mean?

• $\overline{x}$

• $\overline{y}$

• $\overline{xy}$

• $\overrightarrow{xy}$

The formula to calculate the position of the lower quartile is...

• $\frac{1}{8}\left(n+1\right)$

• $\frac{1}{2}\left(n+1\right)$

• $\frac{3}{4}\left(n+1\right)$

• $\frac{1}{4}\left(n+1\right)$

What is the mode in the following set of data:

1 2 2 2 3 3 4 4 5 1 2 5 6 7 8 8 8 9 1

• 4

• 1

• 8

• 2