FREE CHOCKS!!! NECO 2015 MATHEMATICS PAPER I & II (obj & Essay) ANSWERS





Runs Updates Desk : Up next 2015 SSCE Exam Schedule.
NECO Exam
Thursday, 11th June, 2015
THURSDAY 11TH JUNE, 2015:
MATHEMATICS PAPER I (Objective)
10.00am – 11.45am
MATHEMATICS PAPER II (Essay) 12.00am – 2:30pm

Questions And Answers Now Available.

Note : Always Indicate the Paper Type Used. Don’t Panic, You will be Mark Right.


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NECO MATHEMATICS 2015 ANSWERS ESSAY
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1a)
x:y:z*6:5:8
M=x/6=y/5=5/8
x:y:z*6m:5m:8m
1.8x=6m
y=3m
z=8m
12x-48/4y+2=12(6m)-8(8m)/4(5m)+8m
=72m-72m/20m+8m
=0m/28m
=0

1b)
un=ar^1
us=ar46
2/81=2r^4
81×2r^4/81×2=2/81—2
r^4=1/81
r=4rot1/81, r=1/3.
ii)sum=a(1-r^n)/1-r
=2(1-(1/3)5)/1-1/3
=2(1-1/243)/2/3
=(242/243)/2/3
484/243-2/3
484/243—3/2
=242/81

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2a)
number of sides=12
radius of circle=10cm
area=?
n—2=360
12-2=360
2=360/12=30°
1+2=180-30
1=150
When 1 and 2 are interior and exterior angle of a polygon A sector has are.
Area of sector=/360×rot8^2
=150/360×22/7×100/1
A=130-95cm^2

2b)
1/2(2x+1)-2/5(x-2)=3
2x+1/3-2x-4/3=3
10x+5-6x+12/15=3/1
Cross multiple
4x+17=45
4x/4=28/4
x=7.

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3)
Apply 5m rule to find C P
t/sin T = P/sin P
t/sin 110 = 6/sin 40
t=6 * 0.9396/0.6428
=56376/6.6428
=87704
=877km

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4)
Total Fruit = 80 + 60 = 140
(a)
(i) Pr one of each fruit is picked
(79/140 *60/139) + ( 59/140 * 80/139)
=4740/19,460 + 4720/19,460
=9460/19,460 = 0.486
4aii)
Pr one type of fruit is picked
(79/140 * 78/139) + (39/140 * 5p/139)
=6162/19,460 + 3422/19,460
= 9584/19,460 = 0.492

4b)
5X/8 – 1/6 ≤ X/3 + 7/24
Multiply through by 24 i:e
15X – 4≤ 8X + 7
15X – 8X ≤ 7 + 4
7X = 11
X ≤ 11/7 ===> X ≤ 1 4/9

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5a)
3/X + 2 – 6/3X – 1
3(3X – 1) – 6 (X + 2)/ (X + 2) ( 3X – 1)
9X – 3 – 6X – 12/(X + 2)(3X – 1)
3X – 15/(X+2)(3X – 1)

5B-)
C.I:p[1+r/100]^
=25000[1+12/100]^3
=25000[1+0.12]^3
=25000 * 1.4049
=35122.50
=N35,122.50

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

6a)
X+-3/2
X=2/3 or X=2
(X + 3/2)^2 or (X -2)
(X + 3/2) (X – 2)
X (X – 2) + 3/2 (X – 2)
X^2 – 2X + 3 X/2 – 3
2X^2 – 4X + 3X – 6
2X^2 – X – 6

6b)
h/h+8 = 6/10
10h = 6h + 48
h = 12
H = h + 8
H = 12 + 8
H = 20
Volume = 1/3 A.h
= 1/3 (10*10) * 20 – 432/3
= 200/3 – 432/3
=1568/3
=522.67cm3

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