Find the range of set of numbers below:

3, 4, 7, 3, 5, 2, 6, 10

(a)  

Find the mean of set of numbers below:

17, 18, 16, 17, 17, 14, 22, 15, 16

Give your answer correct to 1 decimal place.

(a)  

Find the median of set of numbers below:

17, 18, 16, 17, 17, 14, 22, 15, 16

(a)  

A box contains 24 different coloured balls. There are 8 red, 5 blue, 10 purple and the rest are orange. What is the probability of picking a blue ball? Give your answer correct to 2 decimal places.

(a)  

Evaluate the following:
 $\left(-72\right)\div8\times3+\left(-15\right)$  

(a)  

Evaluate the following:
 $\left(-12\right)\times\left(-5\right)\div\left(-6\right)-\left(-30\right)$  

(a)  

Use your calculator to evaluate the following and rounding off your answer to 2 significant figures. $102.45+5.0-0.022$  

(a)  

Determine the number of significant figures for the number, 0.0056030.

(a)  

Evaluate $2a+d-4c$ , given that a = 3, b = 5, c = $-4$   and d = 2. 

(a)  

Evaluate $d^2-cd-a^2$ , given that a = 3, b = 5, c = $-4$ and d = 2.  

(a)  

Evaluate $\frac{b-ad}{2c}$ , given that a = 3, b = 5, c = $-4$ and d = 2. Give an exact answer from your calculator.

(a)  

Find the LCM of 12 and 50.

(a)  

Find the HCF of 36 and 54.

(a)  

Write 280 g as a percentage of 7 kg. Take note of the units.

(a)  

Round off 158 correct to the nearest tens.

(a)  

Round off 4081 correct to the nearest hundreds.

(a)  

Round off 14.62 to 1 decimal place.

(a)  

Round off 2.077 to 2 decimal places.

(a)  

Round off 453 to 1 significant figure.

(a)  

Round off 197 to 2 significant figures.

(a)  

Estimate, correct to the nearest whole number, the value of $\sqrt{97}-\sqrt{50}$ . 

(a)  

Evaluate $\left(-20\right)\div\left(-2\right)-\left(8-3\times4\right)$  

(a)