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This Is A Mathematics Braintest... - Education (2) - Nairaland

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Re: This Is A Mathematics Braintest... by emmyojo22(m): 3:51pm On Feb 08, 2015
Olayemie:
This is a Mathematics brain
test...

A girl went to school and the
teacher asked how old are you?

She replied I don't know bt I
know that I'm half my mother's age.

The teacher asked OK how
old is your mother?

She said
I don't know but I know that my
dad is 5 Years older than my mother.

The teacher, then ask how
old is your dad?

She said I don't know but I know that if we add
our ages the answer is 100 yrs...

Now how old is the girl, her mum,
& her dad?

Stress ur brain a little. If u fail u
make me ur profile pix 4 2days. Your time starts now... happy
sunday everyone...

The girl is 19 years old
The mum is 38 years old
The dad is 43
Re: This Is A Mathematics Braintest... by ajilay(m): 3:51pm On Feb 08, 2015
D gurl 19 mum 38 dad 43
Re: This Is A Mathematics Braintest... by aycd44(m): 3:52pm On Feb 08, 2015
This is a simple calculation:
all add up to 100.
mum is A
dad is A+5
child is A/2
adding all equal 100.
Solving the equation gives A as 38
This implies:
mum is 38 years
dad is 43 years
child is 19 years

thank you....
Re: This Is A Mathematics Braintest... by AndrewChogzy(m): 3:52pm On Feb 08, 2015
girl's age is 19
mother's age is 38, and
father's age is 43

when you add these three ages, you get 100.
Re: This Is A Mathematics Braintest... by Fkforyou(m): 3:53pm On Feb 08, 2015
simple
x +2x +(2x +5) = 100, solve for x and you get the girls age of which you can get the remaining unknown.

2 Likes

Re: This Is A Mathematics Braintest... by aniagoluaustin(m): 3:54pm On Feb 08, 2015
MizMyColi:


Why not allow those who have gathered their thoughts completely to comment first.
Why do you guys keep bringing this forum to ridicule?
who send u work?? work no pay

1 Like

Re: This Is A Mathematics Braintest... by Cholls(m): 3:54pm On Feb 08, 2015
my brother


child-19
mother-38
father-43
total=100 years
Re: This Is A Mathematics Braintest... by vikkysexy1: 3:54pm On Feb 08, 2015
very easy ridiculous ;Dvery easy ridiculous
Re: This Is A Mathematics Braintest... by Mekzmoney(m): 3:55pm On Feb 08, 2015
D dad is 43yrs
D mum is 38yrs
D girl is 19yrs


M correct... Any gift?
Re: This Is A Mathematics Braintest... by jbaby265(f): 3:56pm On Feb 08, 2015
ok
Re: This Is A Mathematics Braintest... by nickydof(m): 3:56pm On Feb 08, 2015
See them! If na '7 things to know before toasting a girl' everywhere for don full. Simple maths question all of them student don run go 1 side. Na God go help all these our students for nigeria.

Girl is 19

Mother is 38

Father is 43
Re: This Is A Mathematics Braintest... by 1miccza: 3:56pm On Feb 08, 2015
Father 43. Mother 38. Girl. 19
Re: This Is A Mathematics Braintest... by PerfectlyPerfect(m): 3:57pm On Feb 08, 2015
xreal:
girl's age is 19
mother's age is 38, and
father's age is 43

when you add these three ages, you get 100.
awesome! this is exactly what I solved, unfortunately u beat me to posting it.
kul shaa, shows there are still geniuses like me out there
Re: This Is A Mathematics Braintest... by Nobody: 3:57pm On Feb 08, 2015
Let the mother's age =x
Daughter's age=x/2
Father's age=x+5
The sum equals 100
Therefore, daughter's age + mother's age + father's age=100
So (x/2) + x +(x+5) = 100
Multiply through by 2, we have
x + 2x + 2x + 10 = 200
Adding all x
5x + 10= 200
5x = 190
x = 190/5
x=38
Mother's age is 38
Daughter's age is19
Father's age is 43

3 Likes

Re: This Is A Mathematics Braintest... by AndrewChogzy(m): 3:58pm On Feb 08, 2015
FP tins for d first time. Dedicated to all my followers on twitter. #@Chogzee#. Bck to the topic. Xreal has said it all. Gul 19, Mum 38 n d Dad 43 Total 100.
Re: This Is A Mathematics Braintest... by bumtos(m): 4:00pm On Feb 08, 2015
I can't stress my brain brother, I just arrived from church.
Re: This Is A Mathematics Braintest... by soulhighman(m): 4:00pm On Feb 08, 2015
Solution
Let the girls age be x
Mother's age is 2x
Father's age is 2x+5
X+2x+(2x+5)=100
5x+5=100
X=95/5=19
Therefore, the girls age is 19
Mother's age =19*2=38
Father's age =38+5=43

2 Likes

Re: This Is A Mathematics Braintest... by coolviv: 4:02pm On Feb 08, 2015
Your parents are not wasting their money on your school fees. wink
xreal:
girl's age is 19
mother's age is 38, and
father's age is 43

when you add these three ages, you get 100.
Re: This Is A Mathematics Braintest... by Nobody: 4:05pm On Feb 08, 2015
Let her mother's age be x. Dat means d daughter's age wil be x/2 and the father's age wil b x+5. (x+x/2+x+5=100).multiplyin each term by 2,d equation becoms(2x+x+2x+10=200) ie (5x+10=200) (5x=200-10) (5x=190) therfor x=190/5=38(mother's age) daugtr's age=38/2=19.father's age=38+5=43. Kapish!!
Re: This Is A Mathematics Braintest... by Ignatio(m): 4:06pm On Feb 08, 2015
Will Try it when I'm sober.
Re: This Is A Mathematics Braintest... by holyokoto(m): 4:06pm On Feb 08, 2015
THE GIRL'S AGE IS = X
THE MOTHER'S AGE WILL BE = 2X (TWICE THE GIRL'S AGE)
THE FATHER'S AGE WILL THEN BE = (2X) + 5
IF ALL THEIR AGE = 100 THEN

X + 2X + 2X + 5 = 100

5X + 5 = 100

5X = 100 - 5

5X = 95

X = 95/5

X = 19 (THE GIRL'S AGE)

THE MOTHER'S AGE WILL BE 19 * 2 = 38

THE FATHER'S AGE WILL BE 38 + 5 = 43
Re: This Is A Mathematics Braintest... by IBROHIM: 4:07pm On Feb 08, 2015
Why is the girl not married? Meanwhile let's call her a woman because her mother was her age when she was born!

1 Like

Re: This Is A Mathematics Braintest... by tseuns: 4:08pm On Feb 08, 2015
[quote author=Olayemie post=30535316]This is a Mathematics brain
test...

A girl went to school and the
teacher asked how old are you?

She replied I don't know bt I
know that I'm half my mother's age.

The teacher asked OK how
old is your mother?

She said
I don't know but I know that my
dad is 5 Years older than my mother.

The teacher, then ask how
old is your dad?

She said I don't know but I know that if we add
our ages the answer is 100 yrs...

Now how old is the girl, her mum,
& her dad?

Stress ur brain a little. If u fail u
make me ur profile pix 4 2days. Your time starts now... happy
sunday everyone...[/quote

Girls age 19, mothers 38, fathers 43 shikena
Re: This Is A Mathematics Braintest... by holyokoto(m): 4:08pm On Feb 08, 2015
[quote author=Fkforyou post=30543013]simple
x +2x +(2x +5) = 100, solve for x and you get the girls age of which you can get the remaining unknown.[/qu
Open the Bracket and collect like terms
Re: This Is A Mathematics Braintest... by sheftyxz(m): 4:09pm On Feb 08, 2015
Girl =19
Mother =38
Father =43


very simple arithmetic

Re: This Is A Mathematics Braintest... by OpraMenu(m): 4:10pm On Feb 08, 2015
THE GIRL'S AGE IS 19 , THE MOTHER'S AGE IS 38 AND THE FATHER'S AGE IS 43.
Re: This Is A Mathematics Braintest... by Nobody: 4:10pm On Feb 08, 2015
Olayemie:
This is a Mathematics brain
test...

A girl went to school and the
teacher asked how old are you?

She replied I don't know bt I
know that I'm half my mother's age.

The teacher asked OK how
old is your mother?

She said
I don't know but I know that my
dad is 5 Years older than my mother.

The teacher, then ask how
old is your dad?

She said I don't know but I know that if we add
our ages the answer is 100 yrs...

Now how old is the girl, her mum,
& her dad?

Stress ur brain a little. If u fail u
make me ur profile pix 4 2days. Your time starts now... happy
sunday everyone...

Let girls age be 'g'

Mum's age be 'm'

Dad's age be 'd'

Since the girl's age is half that the mum then it follows that:

g = m/2 ====>> m = 2g...........(a)

Considering the dad is 5yrs older than the mum, we also have the following:

d = m + 5...........(b)

From (a) we can represent (b) as:

d = 2g + 5...........(c)

Since their combined ages is 100yrs, it follows that

d + m + g = 100..........(d)

Substituting (a) and (c) in (d) we have:

d + m + g = (2g + 5) + 2g + g = 100

====>> 2g + 5 + 2g + g = 100

Collecting like terms, we have:

(2g + 2g + g) + 5 = 100

====>>. 5g + 5 = 100

====>> 5g = 100 - 5

====>> 5g = 95

Divide through by 5, we have:

====>>. g = 19

Substituting "g" in (a) and (c), we have:

m = 2(19) = 38

d = 2(19) + 5 = 38 + 5 = 43

Hence we have the following:

Girl is 19 yrs old.

Mum is 38 yrs old

Dad is 43 yrs old.

Sorry, had to do that cause it has been a long while I worked out a mathematical problem.

3 Likes

Re: This Is A Mathematics Braintest... by ayusco: 4:12pm On Feb 08, 2015
Dad is 43, Mum is 38, daughter is 19
Olayemie:
This is a Mathematics brain
test...

A girl went to school and the
teacher asked how old are you?

She replied I don't know bt I
know that I'm half my mother's age.

The teacher asked OK how
old is your mother?

She said
I don't know but I know that my
dad is 5 Years older than my mother.

The teacher, then ask how
old is your dad?

She said I don't know but I know that if we add
our ages the answer is 100 yrs...

Now how old is the girl, her mum,
& her dad?

Stress ur brain a little. If u fail u
make me ur profile pix 4 2days. Your time starts now... happy
sunday everyone...
Re: This Is A Mathematics Braintest... by AlfaSeltzer(m): 4:12pm On Feb 08, 2015
Her mum conceived barely legal. Ashawo mama.
Re: This Is A Mathematics Braintest... by shaboti: 4:13pm On Feb 08, 2015
So 19 year old girl no sabi her mama and papa age, even her own age.

Lord have mercy
Re: This Is A Mathematics Braintest... by Nobody: 4:13pm On Feb 08, 2015
From mγ workings..
Let y be mother's age
Girl's age is y/2
Father's age is (y+5)
After solving for y,
..The girl,her mother and father are 19,38 and 43yr old respectively..

Re: This Is A Mathematics Braintest... by Nobody: 4:17pm On Feb 08, 2015
Let the girls age be x
and her mother's y
also let her dad age be x+5, since he is 5yrs older than her mum.

The girl is half her mums age,
then 2x=y or x=y/2.............equ 1
their ages adds up to 100, then
x+y+y+5=100........equ 2

therefore from equ 2 we have x+2y=95...........equ 3
but in equ 1, x=y/2
sub x=y/2 in equ 3 and solving,
we have girl is 19, mother 38 and dad 43 respectively

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