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Tuesday 10th Nov
Paper III: Objective – General Mathematics
10:00am – 11:45am
Paper II: Essay – General Mathematics
12:00noon – 2:30pm
===============

MATHS OBJ
1-10: ACBAECABAE
11-20: CCABBCAAEC
21-30: BBEBBBACBD
31-40: CCADBAEABD
41-50: DEBBBCCBBD
51-60: DACEADAEEA

 

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No. 8 corrected

making some correction to No. 8

No. 8 added

 

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Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo. NECO Mathematics Questions and Answers 2025. NECO Maths Expo for Theory & Objective (OBJ) PDF: verified & correct expo Solved Solutions, 2025 NECO MATHEMATICS ANSWERS. 2025 NECO EXAM Mathematics Questions and Answers

expocode.net answers

(1a)
x¹ y¹. x¹ y¹
A (6,5). B ( -2 ,7)

The equation of a straight line
y² - y¹/x² - x¹ = y-y/x¹-x¹

7-5/-2-6 = y-5/x-6
2/-8 = y-5/x-6
-1/4 = y-5/x-6
4(y-5)= -1(x-6)
4y-20= -x+6
4y+x=6+20
4y+x=26

(1b)
∫² (2x + 9)dx

2x²/2+9x + c|²_¹
x² + 9x + c|²_¹
(2² + 9(2) + C) - ((-1)² + 9 (-1)+ c)
(4+18+c) - (1-9+C)
(22 + C) - (-8 + C)
22+C + 8 - C
=30.
===================


(2a)
To calculate u; 18+5+12+u=52
35+u=52
u=52-32=17
u=17

To calculate v
6+5+12+v=35
23+v=35
v=35-23=12
v=12

To calculate w
w+18+17+6+5+12+12
=100
w+70=100
w=100+70=30
w=30

(2b)
at least two means =18+6+5+12=41
; 41 tourist travelled by at least two means of transportation.
==============

(3a)
(i)median =6+6/2=12/2=6
(ii)median + range = 6+7=13
Range = highest value - lowest value = 10-3=7

(3b)
Pr(both pass)
=2/5*3/4=6/20=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=0+4 or x=0-7
x=4 or -7

(4b)
8x/9 - 3x/2 =5/6 - x/1
L.c.m=54
6*8x-27*3x=9*5-54*x
48x-81x=45-54x
48x-81x+54x=45
21x/21=45/21
x=45/21=15/7=2⅐


2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(5)

(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
2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(6)


(6ai)
Volume of sphere = 9 ⅓ ×(its surface area)
4/3πr³ = 28/3×4πr²
r = 28 units

Surface area = 4πr²
= 4x22/7×28×28
= 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
2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(7)

(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
= ₦1,261

2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(8a)
Ta; a+8d=50 --------(1)
T12; a+11d=65---------(2)
Subtract equation (1) from (2)
a+11d-(a+8d)=65-50
a+11d-a-8d=15
11d-8d=15
3d/3=15/3
d=5

Substitute for d=5 in each equation (1)
a+8d=50
a+8(5)=50
a+40=50
a=50-40=10
Sn=n/2(2a+(n-1)d)
S70=70/2(2*10+(70-1)5)
=35(20+69*5)
=35*365=12,775


===========



(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
2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(11)

(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

2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

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(12a)
y=²-2x-3
Tabulate
|x|-2|-1|0|1|2|3|
|y|5|0|-3|-4|-3|0|

(12b)
Graph.
2025 NECO MATHEMATICS ANSWERS 2025 NECO MATHEMATICS: 2025 NECO MATHEMATICS ANSWERS (9942) Welcome to official 2025 Mathematics NECO answer page. We provide 2025 Mathematics NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Maths Expo

(12c)
y=1-3x
|y|-2|-1|0|1|2|3|
|x|7|4|1|-2|-5|-8|

(12d)
(i)the root of the equation x² - 2x - 3= 1-3x are -3 and 1.6

(ii) the minimum value of y is - 4 and the corresponding value of x is 1

 

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