The angle between latitudes 30°S and 13°N is

• A. 17°
• B. 33°
• C. 43°
• D. 53°

Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13.

• A. 2
• B. 4
• C. 10
• D. 11

If sin θ = cos θ, find θ between 0° and 360°

• A. 45°, 225°
• B. 135°, 315°
• C. 45°, 315°
• D. 135°, 225°

The mean of the ages of ten secondary school pupils is 16 but when the age of their teacher is added to it the men becomes 19. Find the age of the teacher

• A. 27
• B. 35
• C. 38
• D. 49

simplify \(\frac{1}{√3 - 2}\) - \(\frac{1}{√3 + 2}\)

• A. 3
• B. 2/3
• C. 7
• D. -4

If two angles of a triangle are 30° each and the longest side is 10cm. Calculate the length of each of the other sides.

• A. 5cm
• B. 4cm
• C. 3√3 cm
• D. 103/√3cm

change 71₁₀ to base 8

• A. 107₈
• B. 106₈
• C. 71₈
• D. 17₈

The following marks were obtained by twenty students in an examination: 53, 30, 70, 84, 59, 43, 90, 20, 78, 48, 44, 60, 81, 73, 50, 37, 67, 68, 64, 52. Find the numbers of students who scored at least 50 marks

• A. 6
• B. 10
• C. 13
• D. 14

A rectangular polygon has 150° as the size of each interior angle. How many sides has the polygon?

• A. 12
• B. 10
• C. 9
• D. 8

In the diagram, O is the centre of the circle and POQ a diameter. If POR = 96°, find the value of ORQ.

• A. 84°
• B. 48°
• C. 45°
• D. 42°