Maths

What is the reciprocal of this expression 8÷1/5?

• 30

• 30.65

• 40

• 16

What is the 10^th term of the arithmetic progression -3, 7, 17, . . . ?

• 33

• 87

• 97

• 107

If x + 2y = 0 and 4x – 3y = 11, find the value of x + y

• -3

• -1

• 0

• 1

Exact value: 6.25m and approximate measurement: 5.5m, what is the percentage error?

• 20%

• 12%

• 79%

• 50%

The characteristics of the logs of all numbers equal to or greater than 1 are equal to or greater than

• 0

• 1

• 10

• 11

If the 2nd and 5th terms of a G.P are 6 and 48 respectively, find the sum of the first four term

• 45

• -15

• 15

• 33

Find the value of k such that x² – 5x + k is a perfect square

• 2 ½

• 4 ¼

• 6 ¼

• 25

What is one-fifth of sum of 30, 12 and 18

• 5

• 7

• 9

• 12

A sales girl gave a change of N1.15 instead of N1.25. Calculate the percentage error

• 10%

• 8.7%

• 8.0%

• 2.4%

Express 398753 correct to three significant figures

• 39800

• 399000

• 398700

• 398800