What is sin 30${}^{}$?

P is the point (3, 5). Q is the point (-1, 9). R is the midpoint of PQ. Which one of the following lines does R lie on?

What is the sum of the first 40 even positive integers?

The graph of cumulative frequency distribution is called

The roof of a shelter is made from a piece of corrugated iron 2.3m long inclined at 18º to the horizontal. How far from the wall does the roof stick out?

A company employs 100 people, 65 of whom are men. 60 people including all the women are paid weekly. The number of the men that are paid weekly is

Find the distance between points A(-4, 5) and B(-3, 2).

As a general rule, the _______ is the best measure of central tendency because it is more precise.

The heights in cm, of 10 children are 145, 163, 159, 162, 167, 149, 150, 160, 170, and 155. The mean height of the children is

At what value of x is the function y = x² - 6x - 7 minimum?

In a class, 120 students speak English or French or both. 70 speak English and 55 speak French. How many speak English but not French?

If x and y represent the mean and the median respectively of the following marks of students in a Mathematics test; 11, 12, 13, 14, 15, 16, 17, 18, 19, 21. Find x/y correct to 1 decimal place.

Ann goes swimming regularly. She wants to improve her fitness, so she decides to swim 10 lengths in the first session and increase the number of lengths she swims by 2 every session. When she reaches 50 lengths in a session she will not increase the number any further. After how many sessions does Ann swim 50 lengths for the first time?

The ______ is the value you calculate when you want the arithmetic average.

One of these is not a desirable feature of a good statistical table

A is the point (1, 5), B is the point (4, 7) and C is the point (5, 2). Triangle ABC is

Rationalize $\frac{(4\sqrt{7}+\sqrt{2})\; /}{(\sqrt{2}-7)}$

A straight line has the equation 10y = 3x + 15. Which of the following is true?

Find the point on the Euclidean plane where the curve y = 2x² - 2x + 9 has 2 as gradient.

Find the variance of the numbers k, k + 1, k + 2.

In an arithmetic sequence whose 4th term is 14 and whose 11th term is 70, the sum of the first 12 terms of the sequence is

If 35 is the median of the data set including 21, 7, 45, 33, 62 and x, then x =

Which of the following points does not lie on the line 2y + 5x -4 = 0?

Ann goes swimming regularly. She wants to improve her fitness, so she decides to swim 10 lengths in the first session and increase the number of lengths she swims by 2 every session. When she reaches 50 lengths in a session she will not increase the number any further. Ann decides she will give herself a reward
when she has swum a total of 400 lengths. After how many sessions does she get her reward?

Given the list of numbers {1, 6, 3, 9, 16, 11, 2, 9, 5, 7, 12, 13, 8}, what is the median?

A straight line has a gradient of -2 and passes through the point (4, 1). What is its equation?

Tunse bought a house for ₦1,250,000.00 and spent ₦350,000.00 to renovate it. He then sold the house for ₦2,000,000.00. What is the percentage gain?

Divide the L.C.M. of 36, 54 and 90 by their HCF.

The second and fifth terms of a geometric progression a 21 and 567 respectively. Find the first time and the common ratio of the progression.

In a survey of villagers, it is found that 20% of the people have visited Kano and 25% have visited Port Harcourt. If 5% have been to both cities, then the percentage that have visited neither Kano nor Port Harcourt is

If un = 2, 6, 10, ..., the last tem of the sequence is 90. The number of terms in the sequence is

Find the sum to infinity of the following series 3 + 2 + 4 + 4/3 + 8/9 + 16/27 + ......

Find the equation of the line through (5,7) parallel to the line 7x + 5y - 5 = 0.

A frustum of a pyramid is 3cm square at the top and 6cm square at the bottom and is 5cm high. The volume in cm³ of the frustum is

Find the number of sides of a regular polygon whose interior angle is twice the exterior angle.

What is the length of an arc of a circle with a radius of 5 if it subtends an angle of 60° at the center?

Statistics is a set of tools whose proper use will _______ the decision maker.

A rectangular box with a square base and no top has a volume of 500 cm, the dimensions of the box that require the least amount of material are

_________ are used when you want to visually examine the relationship between two quantitative variables.

Which of the following is the formula for range?