NECO SSCE - General Mathematics - 2005…

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 Juist antwoord

8.4m

11.9m

17.3m

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Lees lesnotitie op Angles Of Elevation And Depression (WAEC)

Angles Of Elevation And Depression

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Vraag 8 Verslag

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?

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

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

\(\frac{4}{9}\) Juist antwoord

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

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Lees lesnotitie op Probability (WAEC)

Probability

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Vraag 9 Verslag

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} Juist antwoord

U = {1 < x < 10}

{2 < x < 10}

Antwoorddetails

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Vraag 10 Verslag

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 Juist antwoord

3470km

2488km

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Lees lesnotitie op Circles (WAEC)

Lees lesnotitie op Angles Of Elevation And Depression (WAEC)

Circles

Angles Of Elevation And Depression

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Vraag 11 Verslag

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

49 Juist antwoord

196

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Lees lesnotitie op Algebraic Expressions (WAEC)

Lees lesnotitie op Quadratic Equations (WAEC)

Algebraic Expressions

Quadratic Equations

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Vraag 12 Verslag

T varies directly as D and inversely as A. Given that T = 6, D = 3, and A = 2, find A when T = 3 and D = 6.

8 Juist antwoord

Antwoorddetails

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Vraag 13 Verslag

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

a = -1

a = 1

a = ±1 Juist antwoord

a = ±5

a = 25

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Lees lesnotitie op Indices (WAEC)

Indices

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Vraag 14 Verslag

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

24cm Juist antwoord

48cm

95cm

100cm

124cm

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Lees lesnotitie op Volumes (WAEC)

Lees lesnotitie op Lengths And Perimeters (WAEC)

Volumes

Lengths And Perimeters

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Vraag 15 Verslag

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 Juist antwoord

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Lees lesnotitie op Solution Of Linear Equations (WAEC)

Lees lesnotitie op Linear Inequalities (WAEC)

Lees lesnotitie op Quadratic Equations (WAEC)

Solution Of Linear Equations

Linear Inequalities

Quadratic Equations

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Vraag 16 Verslag

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

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

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

3 Juist antwoord

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

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Lees lesnotitie op Solution Of Linear Equations (WAEC)

Lees lesnotitie op Algebraic Expressions (WAEC)

Solution Of Linear Equations

Algebraic Expressions

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Vraag 17 Verslag

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) Juist antwoord

(2,3,...10)

(1,2,...10)

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Vraag 18 Verslag

Simplify P^-6 × P³ × P² ÷ P⁴ × P⁰

p⁵

p⁴

p³

p^-3

p^-5 Juist antwoord

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Lees lesnotitie op Indices (WAEC)

Indices

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Vraag 19 Verslag

In Δ ABC, A = 60°, C = 90° and AC = 12m. Find the Length of the hypotenuse.

24m Juist antwoord

14m

12m

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Lees lesnotitie op Circles (WAEC)

Lees lesnotitie op Angles Of Elevation And Depression (WAEC)

Circles

Angles Of Elevation And Depression

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Vraag 20 Verslag

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

14.6

6.2

1.2 Juist antwoord

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Lees lesnotitie op Representation Of Data (JAMB)

Lees lesnotitie op Measures Of Location (JAMB)

Representation Of Data

Measures Of Location

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Vraag 21 Verslag

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 Juist antwoord

II only

III only

I and II only

II and III only

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Lees lesnotitie op Representation Of Data (JAMB)

Representation Of Data

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Vraag 22 Verslag

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 Juist antwoord

6cm

7cm

10cm

12cm

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Lees lesnotitie op Mensuration (JAMB)

Lees lesnotitie op Triangles And Polygons (WAEC)

Mensuration

Triangles And Polygons

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Vraag 23 Verslag

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

10 Juist antwoord

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Lees lesnotitie op Solution Of Linear Equations (WAEC)

Lees lesnotitie op Quadratic Equations (WAEC)

Solution Of Linear Equations

Quadratic Equations

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Vraag 24 Verslag

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 Juist antwoord

16.86km

44.57km

67.17km

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Lees lesnotitie op Bearings (WAEC)

Lees lesnotitie op Coordinate Geometry (JAMB)

Bearings

Coordinate Geometry

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Vraag 25 Verslag

What is the Value of 11101\(_{two}\)+ 10011\(_{two}\) - 10001\(_{two}\)?

10001\(_{two}\)

10011\(_{two}\)

10111\(_{two}\)

11111\(_{two}\) Juist antwoord

111111\(_{two}\)

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Lees lesnotitie op Number Bases (WAEC)

Number Bases

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Vraag 26 Verslag

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 Juist antwoord

46.20 metres

46.25 metres

46.50 metres

48.25 metres

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Lees lesnotitie op Percentages (WAEC)

Lees lesnotitie op Fractions, Decimals, Approximations And Percentage (JAMB)

Percentages

Fractions, Decimals, Approximations And Percentage

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Vraag 27 Verslag