WAEC Mathematics Objectives & Theory Answers With Questions 2020/2021 Exams – Download PDF Answers Latest Update Today

Welcome to WAEC Mathematics Objectives and theory Answers With Questions 2020 Exams – Download PDF Answers Latest Update Today. It is very obvious that the WAEC Mathematics 2020 will be conducted today 16th May 2020.T he West African Examination Council Have taken time to Set WAEC Mathematics questions from Their current syllabus makes it easy for every student who took the Examination to pass without stress.

We, in this article, are going to provide you with the ideas and available with us to help you provide Answers to Ongoing WAEC Mathematics Exams. Please follow us critically.

WAEC Mathematics Answers 2019

WAEC 2020 Mathematics Objectives questions and Answers

Your WAEC Mathematics Exams Will consist of two sections, the Objectives and theory or essay. You have many options in the objective part to choose one. The options may range from A to D or E, Take only the most preferred answer. You will also be given the theory to answer any from the specified number.

1. Find the sum of the first for term given that the 2nd and 5th terms of a G.P are 6 and 48 respectively.

  • A. -45
  • B. -15
  • C. 15
  • D. 33
  • E. 45

Answer: E (45) See the solutions below:

T22 = ar = 6

T55 = ar44 = 48

T5T2T5T2 = ar4arar4ar = 486486

= r33 = 8

⇒ r = 2

Snn = a((rn)−1)r−1a((rn)−1)r−1

S44 = a((r4)−1)r−1a((r4)−1)r−1

S44 = 3((24)−1)2−13((24)−1)2−1

= 3(16 -1)

= 45

2. If sinθθ = K find tanθθ, 0° ≤≤ θθ ≤≤ 90°.

  • A. 1-K
  • B. kk−1kk−1
  • C. k1−k2√k1−k2
  • D. k1−kk1−k
  • E. kk2−1√

Answer: C ( k1−k2√k1−k2 ) See Solution Below:

sinθ=k1sin⁡θ=k1

⟹12=k2+adj2⟹12=k2+adj2

adj=1−k2−−−−−√adj=1−k2

∴tanθ=k1−k2√

3. Evaluate (101.5)2 – (100.5)2

  • A. 1
  • B. 2.02
  • C. 20.02
  • D. 202
  • E. 2020

Answer: D ( 202 ) Check solution below:

(101.5)2 – (100.5)2;(101.5 + 100.5)

202 x 1

= 202

4. Express the product of 0.06 and 0.09 in standard form

  • A. 5.4 * 10-1
  • B. 5.4*10-2
  • C. 5.4*10-3
  • D. 5.4*102
  • E. 5.4*103

Answer: C ( 5.4*10-3 ) Confirm solution Below:

0.06 x 0.09 = 0.0054

= 5.4 x 10-3

5. Simplify 361212 x 64−13−13 x 500

  • A. 0
  • B. 1\24
  • C. 2/3
  • D. 11/2
  • E. 71/2

Answer: D ( 11/2 ) Confirm the answer Below:

361212 x 64−13−13 x 500

= 6×14×16×14×1

= 112

6. Find the 8th term of the A.P -3, -1, 1 ……

  • A. 13
  • B. 11
  • C. -8
  • D. -11
  • E. -17

Answer: B ( 11 ) Crosscheck the answer below:

Un = a + (n-1)d
 = -3 + (8 – 1)2
 = 11

7. If cos 60° = 1/2, which of the following angle has cosine of -1/2?

  • A. 30o
  • B. 120o
  • C. 150o
  • D. 210o
  • E. 300o

Answer: B ( 120o ) See the Solution Below:

cos 60° = 1/2, cos(180° – 60°) = -1/2

cos120° = -1/2

8. A ladder 9m long leans against a vertical wall, making an angle of 64° with the horizontal ground. calculate correct to one decimal place, how far the foot of the ladder is from the wall.

  • A. 4.0m
  • B. 5.8m
  • C. 7.1m
  • D. 8.1m
  • E. 18.5m

Answer: A (4.om) Crosscheck the solution below:

cos 64° = x/9
x = 9 cos 64°
=3.94 ≅ 4.0m

9. What is the difference in longitude between P (lat. 50°N. long. 50°W) and Q (lat.50°N, long. 150°W)? Find the answer yourself

  • A. 300o
  • B. 200o
  • C. 130o
  • D. 100o
  • E. 30o

10. The number 186,470 was corrected to 186,000. Which of the following describe the degree of approximation made?
I. to the nearest hundred II. to the nearest thousand III. to 3 significant figures IV. to 4 significant figures. Find the answer yourself

  • A. I & III only
  • B. I & IV only
  • C. II & III only
  • D. II & IV only
  • E. All of the above

WAEC Mathematics Essay Questions and Answers

1. Express, correct to three significant figures, 0.003597.

A. 0.359

B. 0.004

C. 0.00360

D. 0.00359

2. Evaluate:  (0.064)^-1/3

A. 5/2

B. 2/5

C. -2/5

D. -5/2

3. Solve:  y+1/2 – 2y-1/3 = 4

A. y = 19

B. y = -19

C. y = -29

D. y = 29

4. Simplify, correct to three significant figures, (27.63)^2 – (12.37)^2

A. 614

B. 612

C. 611

D. 610

5. If  7 + y = 4 (mod 8), find the least value of y, 10<=y<=30

A. 11

B. 13

C. 19

D. 21

6. If  T = (prime numbers) and

   M = (odd numbers) are subsets of

 U = (x: 0<x<=10, and x is an integer), find (T’ n M’).

A. (4, 6, 8, 10)

B. (1, 4, 6, 8, 10)

C. (1, 2, 4, 6, 8, 10)

D. (1, 2, 3, 5, 7, 8, 9)

7. Evaluate: log9 base 3 – log8 base 2 /log9 base 3

A. -1/3

B. 1/2

C. 1/3

D. -1/2

8. If 23= 1111two, find the value of y.

A. 4

B. 5

C. 6

D. 7

9. If 6, P and 14 are consecutive terms in an Arithmetic Progression (A.P), find the value of P.

A. 9

B. 10

C. 6

D. 8

10. Evaluate: 2 (SQRT 28) – 3 (SQRT 50) +  (SQRT 50)

A. 4 (SQRT  7) – 21 (SQRT 2)

B. 4 (SQRT  7) – 11 (SQRT 2)

C. 4 (SQRT  7) – 9 (SQRT 2)

D. 4 (SQRT  7) + (SQRT 2)

11. If m : n = 2 : 1, evaluate 3m^2 – 2n^2 /m^2 + mn

A. 4/3

B. 5/3

C. 3/4

D. 3/5

12. H varies directly as p and inversely as the square of y. If H = 1, p = 8 and y = 2, find H in terms of p and y

A. H = p /4y^2

B. H = 2p / y^2

C. H = p / 2 y^2

D. H = p / y^2

13. Solve 4x^2 – 16x + 15

A. X = 1 (1/2) or X = -2 (1/2)

B. X = 1 (1/2) or X = 2 (1/2)

C. X = 1 (1/2) or X = -1 (1/2)

D. X = -1 (1/2) or X = -2 (1/2)

14. Evaluate 0.42 divided by 2.5 /0.5 x 2.05, leaving the answer in standard form.

A. 1.639 x 10^2

B. 1.639 x 10^1

C. 1.639 x 10^-1

D. 1.639 x 10^-2

15. Simplify: log6 – 3log3 + 2/3log27.

A. 3log 2

B. Log2

C. Log3

D. 2log3

16. Bala sold an article for 6,900.00 naira and made a profit of 15 percent. Calculate his percentage profit if he had sold for 6600.00.

A. 5 percent

B. 10 percent

C. 12 percent

D. 13 percent

17. If 3p = 4q and 9p = 8q-12, find the value of pq.

A. 12

B. 7

C. -7

D. -12

18. If (0.25)^y = 32, find the value of y.

A. y = -5/2

B. y = -3/2

B. y = 3/2

D. y = 5/2

19. There are 8 boys and 4 girls in a lift. What is the probability that the first person who steps out of the lift will be a boy?

A. 3/4

B. 1/3

C. 2/3

D. 1/4

20. Simplify: x^2 – 5x – 14 / x^2 – 9x + 14

A. X – 7 /x + 7

B. X + 7 /x – 7

C. X – 2 /x + 4

D. X + 2 /x – 2

21. Which of these values would make 3p – 1 /p^2 – p undefined?

A. 1

B. 1/3

C. -1/3

D. -1

22. The total surface area of a solid cylinder is 165 cm2. If the base diameter is 7 cm, calculate its height. (Take pi = 22/7)

A. 7.5 cm

B. 4.5 cm

C. 4.0 cm

D. 2.0 cm

23. If 2^a = SQRT(64) and b/a = 3, evaluate a^2 + b^2.

A. 250

B. 160

C. 90

D. 48

24. In triangle XYZ, line XZ = 32 cm, angle YXZ = 52 degrees and XZY = 90 degrees. Find, correct to the nearest centimeter, line XZ.

A. 31 cm

B. 25 cm

C. 20 cm

D. 13 cm

 25. If log 2 base x = 0.3, evaluate log 8 base x.

A. 2.4

B. 1.2

C. 0.9

D. 0.6

26. An arc subtends an angle of 72 degrees at the centre of a circle. Find the length of the arc if the radius of the circle is 3.5 cm. (Take pi = 22/7)

A. 6.6 cm

B8.8 cm

C. 4.4 cm

D. 2.2 cm

27. Make b the subject of the relation

lb = 1/2(a+b)h

A. ah /2l – h

B. 2l – h/al

C. al/2l – h

D. al/2 – h

29. Eric sold his house through an agent who charged 8 percent commission on the selling price. If Eric received 117,760.00 dollars after the sale, what was the selling price of the house?

A. 130,000.00 dollars

B. 128,000.00 dollars

C. 125,000.000 dollars

D. 120,000.00 dollars

29. Find the angle which an arc of length 22 cm subtends at the centre of a circle of radius 15 cm. (take pi = 22/7)

A. 70 degrees

B. 84 degrees

C. 96 degrees

D. 156 degrees

30. A rectangular board has a length of 15 cm and width x cm. If its sides are doubled, find its new area.

A. 60x cm squared

B. 45x cm squared

C. 30x cm squared

D. 15x cm squared

31. In the diagram, POS and ROT are straight lines. OPQR is a parallelogram, line OS = line OT and angle OST = 50 degrees. Calculate the value of angle OPQ.

A. 100 degrees

B. 120 degrees

C.140 degrees

D. 160 degrees

32. Factorize completely: (2x + 2y)(x-y) + (2x – 2y)(x + y)

A. 4(x – y)(x + y)

B. 4(x – y)

C. 2(x – y) (x + y)

D. 2(x – y)

33. The interior angles of a polygon are 3x, 2x, 4x, 3x and 6x. Find the size of the smallest angle of the polygon.

A. 80 degrees

B. 60 degrees

C. 40 degrees

D. 30 degrees

34. A box contains 2 white and 3 blue identical balls. If two balls are picked at random from the box, one after the other with replacement, what is the probability that they are of different colours?

A. 2/3

B. 3/5

C. 7/20

D. 12/25

35. Find the equation of a straight line passing through the points (1, -5) and having gradient of ¾.

A. 3x + 4y – 23 = 0

B. 3x + 4y + 23 = 0

C. 3x – 4y + 23 = 0

D. 3x – 4y – 23 = 0

36. The foot of a ladder is 6 m from the base of an electric pole. The top of the ladder rest against the pole at a point 8 m above the ground. How long is the ladder?

WAEC 2020 Mathematics questions and Answers

The following are set out to help you Answer WAEC Mathematics Objectives and theory question, try and make good use of them.

1.Read and Follow the Exams instructions

The instructions on the questions paper are for you, kindly read it carefully to be at the right side during the Examination. Imagine you answering questions that are not for your country. This will really mess you up. Some people also make a mistake of answering more or less than the number of questions required, this is not a good practice. Doing what you are asked to do is the first step to WAEC mathematics success.

2.Save your time while Answering Questions

Time management is very vital as long as WAEC Mathematics is concerned. Do not waste all your time trying to answer just a question, you have a lot to answer. Many students are fond of abandoning the allocated time only to discover that they are harming themselves. You need time to answer the required number of questions.

3.Start with your best Question

You see a familiar question that can score you well and you abandon it to another one you don’t even have an idea of, what are you? You need to answer the simple questions you know first to boost your confidence. After finishing the simple one, there is a possibility that you will be able to tackle the remaining with boldness.

4.Write and Fill your Details where required

Filling and Writing your Details where required during the examination is very important. Consider yourself leaving the WAEC exams hall without your details on your answer booklet and others. Your tears cannot help you. It is best you start by filling the necessary details before any other thing. Remember this is WAEC Mathematics After today no more till next year.

5.Read the questions Carefully

Read the Exams Questions Carefully before attempting to provide answers. This is very important because it will help you to understand the question better. Some students do not spend time to read questions and as a result, provide wrong answers even when they know the right ones.

6.Go through your booklet before Submission

It is not a waste of time to scan through you answer booklet once before submission. This will help you to make corrections where necessary. Some student submit with incomplete answers they plan to go back and complete.

Related Search for WAEC Mathematics Past Questions and Answers

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WAEC Mathematics Theory Past questions and Answers

WAEC Mathematics Past Objectives and theory Answers PDF Download

Where WAEC Mathematics Questions are coming from

  1. The Latest WAEC Mathematics Syllabus
  2. WAEC Mathematics past questions that concern your country.
  3. The Senior secondary school Mathematics curriculum

I hope at this juncture, You have been guided on WAEC Mathematics Objectives and theory Answers 2019.

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