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

No of children: 0, 1, 2, 3, 4, 5, 6
No of families: 7, 11, 6, 7, 7, 5, 3
Find the mode and median respectively of the distribution above.

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

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

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

A class of all possible subsets of space S is called

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?

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

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

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?

Find all the values of $x$ satisfying the inequality $-14\le 4-3x\le 31$

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

Paul and his friend, Peter went to buy an article costing ₦600. Peter had 10% of the cost and Paul, 40% of the remainder. How much did they have altogether?

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

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

The line y = 5x – 3 and y = 2x + 9 intersects at P. What are the coordinates of P?

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?

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

If x = 2, then (x - 1)(2x - 3) =

Three consecutive positive integers a, b and c are such that b² = 4(a + c). Find the value of c.

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?

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

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.

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

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

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 principal which amounts to ₦4,400 at simple interest in 5 years at 2% per annum

Solve the simultaneous linear equations: 2x + 5y = 11, 7x + 4y = 2.

Which of these is a measure of location?

Find the value of p, if the line which passes through (-1, p) and (-2p, 2) is parallel to the line 2y + 8x - 17 = 0.

Which of the following is the formula for range?

Mr. Robson bought bags of orange for ₦2,500 each. He sold them for ₦90,000 at a loss of 20%. How many bags of orange did he buy?

What is the slope of the line that is perpendicular to y - 2x = 1?

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

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?

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

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

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

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

P is the point (2, 7) and Q is the point (6, 3). What is the gradient of PQ?