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2016 NECO GCE MATHEMATICS QUESTION AND ANSWERS NOW AVAILABLE FOR FREE
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EDUBRAZEE 02:48 Fri, 18 Nov 2016

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MATHS ANSWERS

UPDATED NUMBERS: 1,2,3,4,5,8,10,11...

MATHS OBJ
1EAACBAECBE
11CDABECBCCA
21AEDCBACEDE
31ADADCCDABD
41BCEBDCEABE
51DBAECBECBE
==========

1a)
(6y²)³ / 2+y^6
= 6³y^6 / 24y^6
=6³*y^6/24*y^6
= 216/24
=9

1b)
Log10(2m²+5m-2)=1
2m²+5m-2=10
2m²+5m-2-10=0
2m²+5m-12=0

Using m=-b+-√b²-4ac/2a
a=2
b=5
c=-12

m=-5+-√5²-4*2*(-12)/2*2
m=-5+-√2+96/4
m=-5+-√98/4
m=-5+-9.9/4
m=-5+9.9/4 or m=-5-9.9/4

M=1.225 or -3.725
==========

2a)
w*3√D
W=k 3√D
10=k*3√27
10/3 =k*3/3 k=10/3
W=10/3*3√64 = 10/3*4*40/3=13 1/3

2b)
X/2 + y/6 = 2/3
L.C.M = 6
Rx + y = 4 -----(1)
X/3 - y/2 = 5/3
L.C.M = 6
2x - 3y = 10 -----(2)

From eq (1)
3x + y = 4
Y= 4 - 3x ------(3)
Sub for y in eq (2)
2x - 3(4-3x) = 10
2x - 12 + 9x = 10
11x = 22
X=2

Sub for x in eq (3)
Y = 4-3(1)
Y = 4-3-
Y = 1
===========

3a)
Sn = a(r^n - 1)
a = 5
r = 3
n= 8
5(3^8 - 1)/ (3-1) = 5(6561-1)/2
= 32800/2 = 164000
==========

4a)V=2/3Πr
1527.4=2/3*22/7*r
1527.4=44r/21
32075.4=44rb
r=32075.4/44
r=728.98
=729cm

4b)
3^3y+1 = 81^-y
3^3y= 3^-4y
3y+1=-4y
1=-4y-3y
1=-7y
Y= - 1/7
===========

5a)
Red=4
Green = 6
Black= 10
Total=20

1)p(Red) = 4/20 = 1/5
2)p(green)= 6/20 = 3/10
3) p (black)= 10/20= 1/2

5b)
( X-1)(X-8)+12=0
X²-8x-X+8+12=0
X²-9x+20=0
X= -b +√b²-4ai
X= 9+/-√-9²-4×1×20÷ 2×1
X=9+/-√81-80÷2
X=9+/-√1÷2
X= 9+1/2 or 9-1/2
X= 10/2 or 8/2
X= 5 or 4
============

(8a)
4a^2 b*3ab^-2/4a^3*(3ab)

=12 a^4 b^1/12a^4 b
=6^-1/b^1
=b^-1-1 =b^2
6^-2 or 1/b^2

8b)
Let the pocket money be x
2x/5 =stations
X/4=school levies
X/6= food
X-(24x/5+x/4+x/6)=55
X-(24x+15x+10x)/60 =55
X-49x/60 =55
60*x-60-49x/60 = 55*60
60x-49x=#3,300
11x/11=3300/11
X=#300
The pocket money =#300

8c)
16^x-4 = 64^x+4/8^x
24^x-16 = 2^6x+24/2^3x
2^4x-16 = 2^6x+24-3x
2^4x-16 = 2^3x+24
4x-16 = 3x + 24
4x - 3x = 16+24
x = 40
============

10)
1/27^(x-2)=9^(2-x)
3^3(x-2)-1=3^2(2-x)
3-1(x-2)=4-2x
2x-4=4-2x
2x+2x=4+4
4x=8
X=8/4
X=2

10b
5x+y/x+5y= 3/1
5x+y= 3(x+5y)
5x+y=3x+15y
5x-3x=15y-y
2x=14y
X/y= 14/2 =7, y/x= 1/7
X2-y2/4xy
Divide all through by my
(X²- y²/) ÷(4xy/xy)
Xy- xy

(X/y- y/x) ÷4
(7- 1/7)÷4 ~~~49-1/7×1/4
48/7× 1/4= 24/7
= 4
============

11a)
A=(1 7,3 2) and B=(2 5,4 6)

i)A^-1=1/det(2 -7,-3 1)
Det= 2 -21=-19
A^-1=1/-19(2 -7,-3 1)
-1/19(2 -7,-3 1)
ii)B^T =(2 -4,5 6)
iii)AB =(1 7,3 2) (2 5,4 6)
(2 -28,6-8, 5+46,15+12)
(-26,-2, 51,27,)

11b)
7x^2 + 12x + 5 = 0
7x^2/7 + 12x/7 = -5/7
X^2 + 12x/7 = -5/7
X^2 12x/7 + (6/7)^2 - -5/7 + (6/7)2
(X+6/7)^2= -5/7 + 36/49
(X+6/7)^2 = -35+36/49
(X +6/7)^2 = 1/49
(X +6/7) = + and - √1/19
X+ 6/7 = + and - 1/7
X = -6/7 + and - 1/7
X = -6+1/7 or -6-1/7
X= -5/7 or -7/7
X = -5/7 or -1


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


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Replies

Guest Thu 25 Jun 2015
Plx kindly help me out
Guest Thu 25 Jun 2015
Plx kindly help me out
Goddodiz001 Wed 01 Jun 2016
Waooo,i luv dat
john Sat 19 Nov 2016
Sir we need the answer to math question pls.
We would continue to invite our friends.
We need it as early as possible.
Thank#
MMM Sat 19 Nov 2016
We need the answers pls


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