NECO SSCE - General Mathematics - 2005…

Frage 1 Bericht

If 25a² = 5^-1 × 125. Find the value of a?

a = -1

a = 1

a = ±1 Richtige Antwort

a = ±5

a = 25

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Lies die Unterrichtsnotiz zu Indices (WAEC)

Indices

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Frage 2 Bericht

A surveyor measured the length of a obtained 42.55 metres. If his measurement was more than the actual length and the percentage error of his measurement was 8%, calculate the actual length of the land

39.40 metres Richtige Antwort

46.20 metres

46.25 metres

46.50 metres

48.25 metres

Antwortdetails

Lies die Unterrichtsnotiz zu Percentages (WAEC)

Lies die Unterrichtsnotiz zu Fractions, Decimals, Approximations And Percentage (JAMB)

Percentages

Fractions, Decimals, Approximations And Percentage

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Frage 3 Bericht

If a = {x : 1 < x < 9} ; b = {x : 0 < x < 9} ; C = {x : 2 x < 9} and a, b, c U, what are the elements in U?

U = {-1 < x < 9}

U = {0 < x < 9}

U = {1 < x < 9} Richtige Antwort

U = {1 < x < 10}

{2 < x < 10}

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Frage 4 Bericht

The parallel sides of a trapezium are 13cm and 7cm. If the area of the trapezium is 50cm2, find the perpendicular distance between the parallel sides.

5cm Richtige Antwort

6cm

7cm

10cm

12cm

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Lies die Unterrichtsnotiz zu Mensuration (JAMB)

Lies die Unterrichtsnotiz zu Triangles And Polygons (WAEC)

Mensuration

Triangles And Polygons

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Frage 5 Bericht

3 - 7, 8 - 12, 13 - 17, 18 - 22. Which of the following is/are true?
I. The class Interval is 4
II. The class boundaries are 2.5, 7.5, 12.5, 18.5, 22.5
III. The mid-marks are 5, 10, 15, and 20

I only Richtige Antwort

II only

III only

I and II only

II and III only

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Lies die Unterrichtsnotiz zu Representation Of Data (JAMB)

Representation Of Data

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Frage 6 Bericht

A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours?

\(\frac{13}{26}\)

\(\frac{5}{18}\)

\(\frac{4}{9}\) Richtige Antwort

\(\frac{2}{9}\)

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Lies die Unterrichtsnotiz zu Probability (WAEC)

Probability

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Frage 7 Bericht

A ship sails 6km from a port on a bearing 070° and then 8km on a bearing of 040°. Find the distance from the port.

7.21km

13.53km Richtige Antwort

16.86km

44.57km

67.17km

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Lies die Unterrichtsnotiz zu Bearings (WAEC)

Lies die Unterrichtsnotiz zu Coordinate Geometry (JAMB)

Bearings

Coordinate Geometry

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Frage 8 Bericht

If (x - a) is a factor of bx - ax + x² - ab, what is the other factor?

(x + b) Richtige Antwort

(b - a)

(x - a)

(a + b)

(a - b)

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Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Lies die Unterrichtsnotiz zu Algebraic Expressions (WAEC)

Solution Of Linear Equations

Algebraic Expressions

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Frage 9 Bericht

A car dealer sells a car and makes a profit of 15%. If the car costs N320,000.00, how much did he sell the car?

N272,000.00

N296,000.00

N300,000.00

N368,000.00 Richtige Antwort

N400,000.00

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Lies die Unterrichtsnotiz zu Ratio, Proportions And Rates (WAEC)

Lies die Unterrichtsnotiz zu Financial Arithmetic (WAEC)

Ratio, Proportions And Rates

Financial Arithmetic

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Frage 10 Bericht

Find the value of 2a - b if a + b = 8 and 4a - b = 22

10 Richtige Antwort

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Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Lies die Unterrichtsnotiz zu Quadratic Equations (WAEC)

Solution Of Linear Equations

Quadratic Equations

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Frage 11 Bericht

If y²+ 14y + k is a perfect square, then k =

49 Richtige Antwort

196

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Lies die Unterrichtsnotiz zu Algebraic Expressions (WAEC)

Lies die Unterrichtsnotiz zu Quadratic Equations (WAEC)

Algebraic Expressions

Quadratic Equations

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Frage 12 Bericht

A chord 20cm long subtends an angle of 60° at the circumference of a circle, what is the diameter of the circle the nearest cm?

12cm

20cm

23cm Richtige Antwort

60cm

80cm

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Lies die Unterrichtsnotiz zu Sine, Cosine And Tangent Of An Angle (WAEC)

Lies die Unterrichtsnotiz zu Circles (WAEC)

Sine, Cosine And Tangent Of An Angle

Circles

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Frage 13 Bericht

Find the absolute mean deviation of the sample 10, 12, 14, 11, 13.

14.6

6.2

1.2 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Representation Of Data (JAMB)

Lies die Unterrichtsnotiz zu Measures Of Location (JAMB)

Representation Of Data

Measures Of Location

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Frage 14 Bericht

A flagpole is placed at the top of a tower. The angles of elevation of the bottom and top of the flagpole from a point on the ground 10m away are 40° and 50° respectively. Find the length of the flagpole.

1.8m

3.5m Richtige Antwort

8.4m

11.9m

17.3m

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Lies die Unterrichtsnotiz zu Angles Of Elevation And Depression (WAEC)

Angles Of Elevation And Depression

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Frage 15 Bericht

What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

– 2.0

– 184

-1.84

2 Richtige Antwort

18.4

Antwortdetails

Lies die Unterrichtsnotiz zu Positive And Negative Integers, Rational Numbers (WAEC)

Lies die Unterrichtsnotiz zu Quadratic Equations (WAEC)

Positive And Negative Integers, Rational Numbers

Quadratic Equations

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Frage 16 Bericht

Solve for x in the quadratic equation. 2x² + 12x + 10 = 0

x = -5, -1 Richtige Antwort

x = -5,1

x = -3, -2

x = 3, 2

x = 6, 5

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Lies die Unterrichtsnotiz zu Quadratic Equations (WAEC)

Quadratic Equations

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Frage 17 Bericht

If x + \(\frac{1}{x}\) = 8, find x² + \(\frac{1}{x^2}\)

62 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Algebraic Expressions (WAEC)

Algebraic Expressions

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Frage 18 Bericht

Find the Iength of a diagonal of a square whose area is 288cm².

24cm Richtige Antwort

48cm

95cm

100cm

124cm

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Lies die Unterrichtsnotiz zu Volumes (WAEC)

Lies die Unterrichtsnotiz zu Lengths And Perimeters (WAEC)

Volumes

Lengths And Perimeters

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Frage 19 Bericht

Evaluate 0.0025 × 2.5 × 102 to 2 significant figures.

0.625 × 10^-3

0.63 × 10^-2

6.25 × 10^-3

6.3 × 10^-2

6.3 × 10^-1 Richtige Antwort

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Lies die Unterrichtsnotiz zu Fractions, Decimals And Approximations (WAEC)

Fractions, Decimals And Approximations

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Frage 20 Bericht

Simplify P^-6 × P³ × P² ÷ P⁴ × P⁰

p⁵

p⁴

p³

p^-3

p^-5 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Indices (WAEC)

Indices

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Frage 21 Bericht

If 7 is subtracted from twice a certain number x, the result is at most 5. What is the range of the number?

x < 2

x < 3

x < 4

x < 5

x < 6 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Lies die Unterrichtsnotiz zu Linear Inequalities (WAEC)

Lies die Unterrichtsnotiz zu Quadratic Equations (WAEC)

Solution Of Linear Equations

Linear Inequalities

Quadratic Equations

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Frage 22 Bericht

Evaluate log 18 + log⁶ - log16\(^{\frac{1}{2}}\)

log 3

log 9

log 20

3 log 2

3 log 3 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Indices, Logarithms And Surds (JAMB)

Lies die Unterrichtsnotiz zu Logarithms (WAEC)

Indices, Logarithms And Surds

Logarithms

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Frage 23 Bericht

If 2x : ( x + 1) = 3 : 2, what is the value of x?

\(\frac{1}{2}\)

1\(\frac{1}{2}\)

3 Richtige Antwort

3\(\frac{1}{2}\)

Antwortdetails

Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Lies die Unterrichtsnotiz zu Algebraic Expressions (WAEC)

Solution Of Linear Equations

Algebraic Expressions

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Frage 24 Bericht

Mohammed is 8 years older than Joy now. In five years’ time he will be twice as old as Joy. How old is Joy now?

1\(\frac{1}{2}\)years

3years Richtige Antwort

4\(\frac{1}{2}\)years

6 years

8 years

Antwortdetails

Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Lies die Unterrichtsnotiz zu Number Bases (WAEC)

Solution Of Linear Equations

Number Bases

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Frage 25 Bericht

Find the standard deviation of the numbers 6, 9, 10, 8 and 7

1.4 Richtige Antwort

2.4

Antwortdetails

Lies die Unterrichtsnotiz zu Measures Of Dispersion (JAMB)

Measures Of Dispersion

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Frage 26 Bericht

For what value(s) of x is the expression (x² + 15x + 50) ÷ (x - 5) not defined

-5, -10

-10

-5

5 Richtige Antwort

10, 5

Antwortdetails

Lies die Unterrichtsnotiz zu Solution Of Linear Equations (WAEC)

Solution Of Linear Equations

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Frage 27 Bericht

If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

(-1,2,...5)

(-1,1,....5)

(1,2,..5) Richtige Antwort

(2,3,...10)

(1,2,...10)

Antwortdetails

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Frage 28 Bericht

A is at 50°N and B is at 10°N, If A and B are on the same longitude, find the distance AS. Correct your answer to Four significant figures. (Earth radius = 6400km)

6468km

5469km

4470km Richtige Antwort

3470km

2488km

Antwortdetails

Lies die Unterrichtsnotiz zu Circles (WAEC)

Lies die Unterrichtsnotiz zu Angles Of Elevation And Depression (WAEC)

Circles

Angles Of Elevation And Depression

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Frage 29 Bericht