# Waec 2018 Mathematics Obj And Theory Answers – May/June Expo

Mr. Maraj Post In Gidifans Examination Center (GEC) 1931 |

Maths OBJ:

1ABBCDDBBAA

11ADAACCDCCC

21DADBABCDAD

31BADADBCACB

41ADDDBDADCA

9a)

Draw the diagram

Angles PTR and PSR are similar

|PT|/|PS| = |TQ|/|SR|

In angle PTR

|TQ|²=|PT|²+|PQ|²-2|PT||PQ|cos30degrees

=4²+6²-2×4×6×cos30

=16+36-48×0.8660

=52-41.568

=10.432

|TQ|=√10.432 =3.22cm

4/10 = 3.22/|SR|

4|SR| = 10×3.22

|SR| = 32.2/4

|SR| = 8.05cn

Approximately 8cm(to the nearest whole number)

5a)

m+n+s+p+q/5=12

m+n+s+p+q=60……(1)

Now;

(m+4)+(n-3)+(5+6)+p-2)+(q+8)/5

=(m+n+s+p+q)+(4-3+3+6-2+8)/5

=60+13/5

=73/5

=14.6

7a)

X1-X/Y1-Y = X2-X1/Y2-Y1

2-X/5-Y = -4-2/-7-5

2-X/5-Y= -6/-12

-12(2-X)=-6(5-Y)

-24+12X=-30+6Y

6Y-12X=30+24

6Y-12X=-6

6y-12x+6=0

y-2x+1=0

8a)

Cost price for Lami= #300.00

Profit made by lami = x%

Ie selling price for lami=(100+x/100)×#300

=#3(100+x)

=#(300+3x)

10a)

Using Pythagoras theorem from SPQ

|SQ|^2 = 12^2 + 5^2

= 144+25

=169

SQ= sqroot of 169

= 13cm

Sin tita= 5/13 = 0.3846

Tita= Sin^-1(0.3846)

= 22.6degrees

From PRQ

Sin tita= |PR|/12

Sin 22.6 = PR/12

Sin 22.6= PR/12

PR= 12xsin 22.6

PR= 12×0.3843

PR= 4.61cm

CLICK HERE FOR NO.2 nd 8 co. ANSWER

CLICK HERE FOR NO.9 ANSWER

6a)

Draw the Venn diagram

Let the number of cars with faults in brakes only be x

2)

Given that y = 2pxˆ² – p² x – 14

AT (3, 10)

10 = 2p(3)² – p² (3) – 14

10 = 18p – 3p² – 14

3p² – 18p + 24 = 0

p² – 6p + 8 = 0

using factor method,

p² – 2p -4p + 8 = 0

p(p-2) – 4(p-2) = 0

(p-4)(p-2) = 0

p-4 = 0 or p-4 = 0

p= 4 or p =2

3a)

The diagonal = 10.2m and 9.3cm

Using Pythagoras theory

Ac² = 10.2² + 9-3²

Ac² = 104.04 + 86.49

Ac² = 190.53

Ac² = √190.53

Ac² = 13.80

4ai)

sum of angle in a D =180degree

xdegree + 90degree + 180degree – (3x+15)=180degree

xdegree + 90degree + 180degree – 3x+15=180degree

-2x=180degree – 255

+2x/2=+75/2

x=37.5

4aii)

<RsQ =180 – (3x+15)

<RsQ =180-(3*37.5+15)

=180-(112.5 + 15)

=180 – 127.5

<RsQ= 52.5degree

1)

On February 28th 2012, value = (100-30/100) * #900,00.00

= 70/100 * #900,00

= #630,000.00

On february 28th 2013, value = (100-22/1000 * #630,00

= 78/100 8 #630,000

= #491,400

On february 28th 2014, value = 78/100 8 #491,400

=383,292

On february 28th 2015, value = 78/100 * #383,292

= #298,967.76

CLICK HERE FOR NO.3 AND 4 ANSWERS

CLICK HERE FOR NO.1 ANSWER

CLICK HERE FOR NO.7 TABLE

MATHS ASSISTANCE PROGRAM

/ means DIVISION

* means Multiplication

tita You Should Know that.

rais means Raise to power or

^ means Raise to power

sqr rut/square rut means Square root

—–(1) means Equation 1

yr means Year

CLICK HERE TO STUDY THE FULL MATHS SYMBOLS

Maths OBJ:

1ABBCDDBBAA

11ADAACCDCCC

21DADBABCDAD

31BADADBCACB

41ADDDBDADCA

9a)

Draw the diagram

Angles PTR and PSR are similar

|PT|/|PS| = |TQ|/|SR|

In angle PTR

|TQ|²=|PT|²+|PQ|²-2|PT||PQ|cos30degrees

=4²+6²-2×4×6×cos30

=16+36-48×0.8660

=52-41.568

=10.432

|TQ|=√10.432 =3.22cm

4/10 = 3.22/|SR|

4|SR| = 10×3.22

|SR| = 32.2/4

|SR| = 8.05cn

Approximately 8cm(to the nearest whole number)

9b)

Atqrs = AΔPSR – AΔPTR

AΔPTR = 1/2×4×6×sin30

=2×6×0.5

=6cm²

AanglePTQ/AanglePSR = |PT|²/|PS|²

6/AanglePSR = 4²/10²

6/AanglePSR = 16/100

16×AanglePSR = 6×100

AanglePSR = 600/16 = 37.5cm2

ATQRS = 37.5 – 6

=31.5cm2

=32cm2

5a)

m+n+s+p+q/5=12

m+n+s+p+q=60……(1)

Now;

(m+4)+(n-3)+(5+6)+p-2)+(q+8)/5

=(m+n+s+p+q)+(4-3+3+6-2+8)/5

=60+13/5

=73/5

=14.6

5b)

75% of 500 = 375 people

Number of people above 65 years = 500-375

=125

25% of 500 = 125

Number of people below 15 years = 125

Number between 15 years and 65 years

=500-(125+125)

=500-250

=250 people

7a)

X1-X/Y1-Y = X2-X1/Y2-Y1

2-X/5-Y = -4-2/-7-5

2-X/5-Y= -6/-12

-12(2-X)=-6(5-Y)

-24+12X=-30+6Y

6Y-12X=30+24

6Y-12X=-6

6y-12x+6=0

y-2x+1=0

7bi)

DRAW THE DIAGRAM

7bii)

I)

p^2=q+r^2-2qrcosP

p^2=8^2+5^2-2*8*5*cos90

p^2=64+25-0

p^2=89

p=sqroot(89)

p=9.4339km

therefore |QR|=9.43km(3 sf)

II)

q/sinQ=p/sinP

8/sinQ=9.4339/sin90

sinQ=(8*sin90/9.4339

sinq=(8*1)/9.4339 =0.8480

Q=sin^1(0.8480)=57.99 degrees

but Q=30+ A

A=Q-30

=57.99-30

A=27.99 degrees

The bearing of R from Q

=180-A

180-27.99

=155.01

=>152 degrees

8a)

Cost price for Lami= #300.00

Profit made by lami = x%

Ie selling price for lami=(100+x/100)×#300

=#3(100+x)

=#(300+3x)

Bola’s cost price = #3(100+x)

Profit made by bola =x%

Selling price for bola =(100+x/100)×#3(100+x)

=#3/100(100+x)²

James cost price =#3/100(100+x)²=300+(6x+3/4)

expanding;

3/100(10000+200+x²) = 300+3/4+6x

3(10000+200x+x²)=30000+75+600x

30000+600x+3x²=30000+75+600x

3x²=75

X² = 75/3

X² = 25

X = square root 25

X = 5

8b)

3x-2<10+x<2+5x

3x-2<10+x & 10+x<2+5x

3x-x<10+2 & 10-2<5x-x

2x<12 8<4x

X<12/2 4x>8

X<6 x>8/4

X>2

Also; 3x-2<2+5x

-4<2x

2x > -4

X > -2

Therefore; Range is -2

10a)

Using Pythagoras theorem from SPQ

|SQ|^2 = 12^2 + 5^2

= 144+25

=169

SQ= sqroot of 169

= 13cm

Sin tita= 5/13 = 0.3846

Tita= Sin^-1(0.3846)

= 22.6degrees

From PRQ

Sin tita= |PR|/12

Sin 22.6 = PR/12

Sin 22.6= PR/12

PR= 12xsin 22.6

PR= 12×0.3843

PR= 4.61cm

10bii)

Let the height at which m touches the wall= y

Cos x^degrees= 8/10= 0.8

x^degrees= Cos^-1(0.8)

= 36.87degrees

Sin x^degrees = y/12

Sin 36.87= y/12

y= 12xsin36.87

y= 12×0.60000

y= 7.2m

CLICK HERE FOR NO.2 nd 8 co. ANSWER

CLICK HERE FOR NO.9 ANSWER

6a)

Draw the Venn diagram

Let the number of cars with faults in brakes only be x

6b) Number that passed = 60% × 240 = 144

Number that failed =

240 – 144 = 96

Therefore; 28+2x+x+14+6+6-x+8 = 96

2x + 62 = 96

2x = 96 – 62

2x = 34

X = 34/2

X = 17

i) faulty brakes cars = 8+6+x+6-x

= 8+6+6

=20

ii) only one fault = 28+x+2x

=28+3x

=28+3(19)

=28+51

= 79

2)

Given that y = 2pxˆ² – p² x – 14

AT (3, 10)

10 = 2p(3)² – p² (3) – 14

10 = 18p – 3p² – 14

3p² – 18p + 24 = 0

p² – 6p + 8 = 0

using factor method,

p² – 2p -4p + 8 = 0

p(p-2) – 4(p-2) = 0

(p-4)(p-2) = 0

p-4 = 0 or p-4 = 0

p= 4 or p =2

2b)

The lines must be solved simultenously

3y – 2x = 21 ——- (1)

4y + 5x = 5 ——-(2)

using elimination method,

(4) 3y – 2x = 21

(30 4y + 5x = 5

12y – 8y = 84 ——— (3)

12y + 15x = 15 ——-(4)

equ (4) minus equ(3)

23x = -69

x = -69/23

x = -3

Put this into equation (1)

3y -2(-3) = 21

3y = 6 = 21

3y = 21 -6

3y = 15

y =15/3

y = 5

coordinates of Q is (-3, 5)

3a)

The diagonal = 10.2m and 9.3cm

Using Pythagoras theory

Ac² = 10.2² + 9-3²

Ac² = 104.04 + 86.49

Ac² = 190.53

Ac² = √190.53

Ac² = 13.80

3b)

DRAW THE DIAGRAM

Using Pythagoras theory

5² = 3² + x²

x² = 5² – 3²

X²= 25 – 9

X² = √16

X= 4cm

CosX = adjacent/hyp

= 4/5

Tan X = opp/adj. = 3/4

5cos x – 4tan x

5(4/5)- 4(3/4)

20/5 – 12/4

4-3= 1

4ai)

sum of angle in a D =180degree

xdegree + 90degree + 180degree – (3x+15)=180degree

xdegree + 90degree + 180degree – 3x+15=180degree

-2x=180degree – 255

+2x/2=+75/2

x=37.5

4aii)

<RsQ =180 – (3x+15)

<RsQ =180-(3*37.5+15)

=180-(112.5 + 15)

=180 – 127.5

<RsQ= 52.5degree

4b)

2N4seven =15Nnine

2*7^2+N*7^1+4*7degree =1*9^2 + 5*9^1+N*9degree

9*49+N*7+4*1=1*81+5*9+N*1

98+7N+4=81+45+N

7N+102=126+N

7N-N=126-102

6N/6 =24/6

N=4

1)

On February 28th 2012, value = (100-30/100) * #900,00.00

= 70/100 * #900,00

= #630,000.00

On february 28th 2013, value = (100-22/1000 * #630,00

= 78/100 8 #630,000

= #491,400

On february 28th 2014, value = 78/100 8 #491,400

=383,292

On february 28th 2015, value = 78/100 * #383,292

= #298,967.76

CLICK HERE FOR NO.3 AND 4 ANSWERS

CLICK HERE FOR NO.1 ANSWER

CLICK HERE FOR NO.7 TABLE

MATHS ASSISTANCE PROGRAM

/ means DIVISION

* means Multiplication

tita You Should Know that.

rais means Raise to power or

^ means Raise to power

sqr rut/square rut means Square root

—–(1) means Equation 1

yr means Year

CLICK HERE TO STUDY THE FULL MATHS SYMBOLS

**If you like this story, please share it on Facebook, Twitter, Google+, Pinterest ETC.**

…also don’t forget to leave a comment, we would very MUCH appreciate Your Comments On This Post Below. Thanks!

…also don’t forget to leave a comment, we would very MUCH appreciate Your Comments On This Post Below. Thanks!

WAEC 2018 Runz | NECO 2018 Runz |
---|---|

How to Make A/B/C's in Your 2018 Waec Examination - CLICK HERE |
How to Make A/B/C's in Your 2018 Neco Examination - CLICK HERE |

NABTEB 2018 Runz | DAILY 2018 Runz |
---|---|

How to Make A/B/C's in Your 2018 Nabteb Examination - CLICK HERE |
Exam Daily Subscription (Subject Prices) - CLICK HERE |

Waec 2018 Office Practice Obj And Theory Answers – May/June Expo

Waec 2018 Book Keeping Obj And Theory Answers – May/June Expo

Waec 2018 Agric Practical Answers – May/June Expo

Waec 2018 Commerce Obj And Theory Answers – May/June Expo

Waec 2018 Animal Husbandry Practical Answers – May/June Expo

Waec 2018 Government Obj And Theory Answers – May/June Expo

All What You Need To Know About JAMB UTME Result Upgrade

Waec 2018 Practical Specimens

JAMB Cut off Marks 2018/2019 for all Nigerian Universities, Polytechnics and Colleges

2018 WAEC SSCE May/June Timetable

- -Confession Of a Nigerian, 14year-Old-Boy, Well Endowed, Who Had S*x With His Mom’s Best Friend (5)
- -The Day After Christmas (2)
- -GoodBye My Love (4)
- -Lagos Wedding Wahala (19)
- -The Hell in Living in a Man’s World: My Tearful Tale (24)
- -How Our Family Driver Dis-virgined me, Turned Me Into Nymphomaniac (8)
- -Tochi (20)
- -3 Sisters And A Corper (12)
- -4Boys, 4Girls, 1WEEKEND (20)
- -The Stranger I called FRIEND (21)

pls reduce d price na

THANKZ

Wae

so horrible

Pls how will I subscribe to internet link

Pls hw can i subscribe

pls I need my confirmation massage

Please, I’ve been able to connect you, but no avail.I’ve subscribed for mathematics. Please add this number 08167732691. Thank you, please help your brother. Jah bless!!!

you are the best

please don’t do this we need this mathematics mostly pls

Please help me. I’ve dropped my card, contacts for the subscription. Please add me and send your pin.

Mathematics essay and objective 8064926548246888

Mathematics

Mathematics Answer

I haven’t see the link on my phone o pls help

Mathematics

I have subscribe for maths since morning and I’m yet to get the code to access it

please help us

I NEED MATHEMATICS ANSWERS NOW PLEASE

ibrahim baba

maths

na wa ne gaskiya

Gidifans pls pity for us, I wish to send the send but I don’t have money

please send me mathematics answer

I have subscribed to pin option and until now I have not received any pin. I have sent several messages and no feedback. What’s happening here?

Pls i need mathematics

We thank u 4 ur help

please inbox me mathematics answers, because I relied on this site. Thank

pls send marths

Pls is my like counted

Really bad in my sit

Sir u fork up 2day ooo

U be dey try ooo

Is de likes nt yet up to 500?

I am waiting time is going

U people should help o we only have one hour left pls abeg u in the name of God

almighty God will bless you guys

pls I need d obj

Gidifans, you people are real indeed

I Need Obj Answer In Mathematics

Na now una dey bring una own answer.. Metchewww😑😑😕😕

Mohammad adamu kawu

Time is going pls i am Waiting

pls wen are we receiving the obj answer

I am waiting time is going pls fast

we need obj in time please

you guys are really trying, I really appreciate your works GOD BLESS YOU

you guys are really trying, and I eally appreciate your works GOD BLESS YOU

Isn’t the objective ready yet guys?

2dayz Math Was Sumhw Critical But Glory Be 2 God…For He Took Control Of Evry Tin…

Awesome group

Thanks gidifans

pls wats d code for waec maths 2018,, I. lost mine

u ar such a wonderful people