# Expo: NECO Mathematics Questions and Answers 2022/2023 – theory / Objective

Are you looking for 2022/2023 NECO Mathematics questions and answers (expo) for both theory and objectives. You are in the right place. You can read them below.

**I will be showing you the recent NECO mathematics past questions and answers for free. You will see how your NECO mathematics examination will look. I will also show you tips on how to pass your maths easily without any stress.**

Mathematics, sometimes, appears to be the hardest paper in an examination. For that reason, I decided to show you the likely questions and answers by giving you recent NECO mathematics questions. I highly recommend this post for you.

## NECO 2022/2023 Essay and Objectives – General Mathematics

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**2022 NECO Chemistry Expo: Questions and Answers Obj Theory**

**2022 NECO Physics Questions and Answers is Out**

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**This post contains both the mathematics Objectives and the Theory.**

**2022 NECO Mathematics Theory**

**[Updated]**

**1.**

**3.**

**Send us a message** for complete answers.

**Past Questions:**

**No (1a)**

Equation:

y – y1/x – x1=y2 – y1/x2 – x1

y – 5/x – 6 = 7 – 5/-2 – 6

y – 5/x – 6 = 2/-8 = 1/-4

y – 5 = 1/4(x – 6)

y – 5 = -1/4x + 6/4

y = -1/4x + 6/4 + 5

y = -1/4x + 3/2 + 5

y = -1/4x + 13/2

OR 4y = -x+26

X + 4y = 26

**No (1b)**

2

S(2x + 9)dx

-1

= 2X¹+¹/1+1 + 9x]2

-1

= x²+9x]2

-1

=[2²+9(2)] – [(-1)² + 9(-1)]

=[4 + 18] – [1 – 9]

= 22 + 8

= 30

**(2a)**

No that traveled by bus

= u+18+5+12 = 52

=u+35 = 52

u = 52 – 35

u = 17

No that traveled by train

= 6+5+12+v = 35

V + 23 = 35

V = 35 – 23

V = 12

Total no of tourist

=u+v+w+18+12+6+5 = 100

17+12+w+18+12+6+5 = 100

W + 70 = 100

W = 100 – 70

W = 30

**(2b)**

No who travelled by at least two means of transportation

= 18 + 6 + 12 + 5

= 41

**(3ai)**

EF = 50

Median = 25th + 26th/2

= 6+6/2 = 6

**(3aii)**

Range = 10 – 3 = 7

Median + Range = 6 + 7 = 13

**(3b)**

Prob(Olu passes) = 2/5

Prob(Tony passes) = 3/4

Prob(Olu fails) = 3/5

Prob(Tony fails) = 1/4

Prob(both passes) =

2/5 × 3/4 = 3/10

============================================

**(4a)**

X² + 3x – 28 = 0

X² +7x – 4x – 28 = 0

X(x+7)-4(x+7) = 0

(X – 4)(X + 7) = 0

X – 4 = 0 OR x + 7 = 0

X = 4 OR x = -7

**(4b)**

8x/9 – 3x/2 = 5/6 – x

Multiply by 18

18(8x/9) -18(3x/2) = 18(5/6) -18x

16x – 27x = 15 – 18x

18x + 16x – 27x = 15

7x = 15

X = 15/7

X = 2 whole 1/7

============================================

**(5a)**

d/dx(4x³ – 2x + 4)⁵

= 5(4x³-2x+4)⁴ × (12x² – 2)

= 10(6x² – 1)(4x³ – 2x + 4)⁴

**(5b)**

5/3(2-x) – (1-x)/(2-x) = 2/3

Multiply through with 3(2-x)

3(2-x)[5/3(2-x)] -3(2-x)[1-x/2-x] = 3(2-x)(2/3)

5 – 3(1-x) = (2 – x)(2)

5 – 3 + 3x = 4 – 2x

3x + 2x = 4 + 3 – 5

5x = 2

X = 2/5

============================================

**(6ai)**

Volume of sphere = 9 ⅓ ×(its surface area)

4/3πr³ = 28/3×4πr²

r = 28 units

Surface area = 4πr²

= 4×22/7×28×28

= 9856 units squared.

**(6aii)**

Volume = 9 ⅓ × 9856

= 28/3 × 9856

= 91989.33

=91989 cubic units

**(6b)**

log10(3x – 5)² – log10(4x -3)² = log10 25

Log10(3x – 5/4x – 3)² = log10 25

(3x – 5/4x – 3)² = 25

Square root of both sides gives

3x-5/4x-3 = ±5

3x-5 = 5(4x-3) OR 3x-5 = 5(4x-3)

3x-5 = 20x-15 OR 3x-5 = 20x+15

3x-20x = 5-15 OR 3x+20x = 15+5

-17x = -10 OR 23x = 20

X = 10/17 OR x = 20/23

============================================

**(7a)**

Given: 3x + 5y = 10

5y = -3x + 10 OR y = -3/5x+ 2

Gradient of the straight line = -1 ÷ (-2/5)

= 5/3

Equation of line:y-2/x-3 = 5/3

3y-6 = 5x – 15

3y = 5x – 15 + 6

3y = 5x – 9

y = 5/3x – 3

Intercept of line = -3

**(7b)**

Amount = P(1+R/100)³

=8000(1+5/100)³

=8000(1.05)³ OR 8000(1.05/100)³

=8000×1.157625

=#9261

Compound interest = Amount – principal

= 9261 – 8000

= #1261

============================================

**(10a)**

Let the woman’s age be W

Let the daughter’s age be d

Given: w = 4d—–(1)

Given:(w+5)²=(d+5)²+120–(2)

Put eqn(1)into(2)

(4d+5)² = (d+5)² + 120

(4d+5)² – (d+5)² = 120

[4d+5+d+5][4d+5-d-5] = 120

[5d+10][3d] = 120

5(d+2)(3d) = 120

15(d+2)(d) = 120

d(d+2) = 8

d² + 2d – 8 = 0

d² + 4d – 2d – 8 = 0

d(d+4) -2(d+4) = 0

(d – 2)(d + 4) = 0

d – 2 = 0 (only)

d = 2

Daughter is 2 years old

**(10b)**

t = w + wy²/PZ

Multiply through by PZ

Pat = PWZ + wy²

Wy² = ptz – pwz

y² = Pz(t – w)/w

y = ±√PZ(t – w)/w

If P = 5, Z = 10, t = 9, w=3

y = ±√(5)(10) (9-3)/3

y = ±√(5)(10)(6)/3

y = ±√100

y = ±10

**(11)**

|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|Frequency|3|10-T|3T|8|2T+2|T+2|

(a)Ʃ+=50

3+10-T+3T+8+2T+2+T+2=50

3+10+8+2+2-T+3T+2T+T=50

25+5T=50

5T=50-20

5T/5=25/5

T=5

**(11b)**

|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|Frequency|3|5|15|8|12|7|

The frequency of the modal class is 15.

**(11c)**

Tabulate.

|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|F|3|5|1|5|8|1|2|7|50

|X|7|12|17|22|27|32|

|FX|21|60|255|176|324|224|1060

|X-x̅|-14.2|-9.2|-4.2|0.8|5.8|10.8|

|(X-x̅)²|201.64|84.64|17.64|0.64|33.64|116.64|

F|(X-x̅)|604.92|423.2|264.6|5.12|403.68|816.48|2518

Mean (x̅) =Ʃfx/Ʃf=1060/50=21.2

Variance =Ʃf(x-x̅)²/Ʃf

=2518/50

=50.36

**More Answers Loading…**

### Today’s NECO Maths OBJ Answers

1-10: ACBAECABAE

11-20: CCABBCACEE

21-30: BBEBBBACBD

31-40: CCAEBAAABD

41-50: DABBBCCBBD

51-60: DACEADAEEA

**NECO Mathematics Essay Answers Loading…**

**SEE ALSO:**

NECO Questions and Answers For Government is Out

NECOEnglish and Oral Text | Obj & Theory/Essay Questions and Answers is Out

## 2022 NECO Possible maths Questions

The following NECO Maths questions are questions to expect in the 2022 NECO examination.

The questions below are the NECO past questions and answers that will help you in your 2022 Neco Mathematics Questions.

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

A. 5.4×10^-3

B. 5.4×10^-2

C. 5.4×10^-1

D. 5.4×10^2

E. 5.4×10^3

2. Evaluate 4610 base eight – 2675 base eight

A. 1713 base eight

B. 1731 base eight

C. 1735 base eight

D. 1935 base eight

E. 2025 base eight

3. The shorter hand of a clock points to 9. What number did it point to 30 hours ago

A. 2

B. 3

C. 4

D. 5

E. 6

4. Evaluate log(6x^2 + X – 1) = 0

A. x = 1/2 or x = -2/3

B. x = 0 or x= 1

C. x = 2/3 or x = 1/3

D. x = 1 or x= -1

E. x = -1/2 or x = 1/3

5. Given that log2 = 0.3010 and log3 = 0.4771, find the value of log(1.5)^2

A. 0.3522

B. 0.1761

C. 0.1585

D. 0.0881

E. 0.0310

6. The present ages of a mother and her daughter are in ratio 11:3 and the daughter’s age is 9. what will be the ratio of her daughter in years time?

A. 16:9

B. 2:1

C. 33:14

D. 10:3

E. 19:7

7. The first term an of an Arithmetic Progression is equal to twice the common difference d. Find in terms of d, the 5th term of the A.P.

A. 4d

B. 5d

C. 6d

D. a + 5d

E. 2a + 4d

8. The common ratio of a Geometric Progression is 2. If the 5th term is greater than the 1st term by 45, find

A. 3

B. 8

C. 45

D. 48

E. 90

9. In a class of 80 students, every student has to offer Economics or Geography or both. If 65 students offered Economics and 50 offered Geography, how many students offered both subjects.

A. 15

B. 30

C. 35

D. 45

E. 50

10. Solve the equation 7x^2 = 3x

A. x = 3 or 7

B. x = or 7

C. x = 0 or 3/7

D. x = 0 or 9

E. x = 7/3 or 3/7

## How Do I pass NECO Mathematics Examination 2022

Mathematics takes a different shape when it comes to examination. For that reason, I will give you different tricks to use and ensure that you pass your examination.

**1. Solve mathematical problems everyday**

There is this informal saying that ‘**when you leave mathematics, mathematics will also leave you**‘. Ensure you solve at least one mathematical problem each day in order to get well acquainted with it.

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### 2. **Download and follow 2022**** NECO mathematics Syllabus**

Syllabus contains all the topics which you need to read in order to pass an examination. It shows you the areas of concentration such that you don’t have to read a whole textbook before you pass.

The fact remains that National Examination Council (NECO) does not have syllabus. Instead they follow WAEC syllabus. Most of the topics that come out in NECO examination are from the WAEC syllabus. So, using WAEC syllabus is the same thing as using NECO syllabus.

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**See Other Syllabus:**

Physics Syllabus for JAMB and Recommended Textbooks: Download PDF

### 3. Download and Read NECO maths past questions and answers

Past questions and answers are of great help and it is something every examination candidate should not do without. Sometimes, questions are repeated or similar questions appear in your examination. The past question will enable you to have a clue of how to examination looks like.

### 4. **Go for tricks which will help you pass without stress**

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