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## A little brain teaser: What’s your answer?

By Busola Ojumu|2019-11-13T03:57:25+01:00October 9th, 2015|Categories: Quizzes & Fun|Tags: Brain Teaser, Maths, Maths Quiz|27 Comments

Use our classwork notes and past questions to prepare and pass Waec, Jamb and Neco once.

By Busola Ojumu|2019-11-13T03:57:25+01:00October 9th, 2015|Categories: Quizzes & Fun|Tags: Brain Teaser, Maths, Maths Quiz|27 Comments

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IBKMarch 20, 2015 at 12:32 pm27

30March 20, 2015 at 12:34 pmIshola

AmandaMarch 20, 2015 at 12:35 pmIt’s 22

IsraelMarch 20, 2015 at 12:36 pmI go with IBK. 27

HakeemMarch 20, 2015 at 12:36 pm30

AbexMarch 20, 2015 at 12:39 pm27

ModupeolaMarch 20, 2015 at 12:43 pmYou guys should tell us how you’re arriving at your answers

JaneMarch 20, 2015 at 12:45 pmYa, it’s 27

SadiqMarch 20, 2015 at 12:47 pm25

AyoolaMarch 20, 2015 at 3:23 pm25

MoyosoluwaMarch 20, 2015 at 3:24 pm26kg

Layode LalaMarch 20, 2015 at 3:24 pm30

Moses ErhinyodavweMarch 20, 2015 at 4:16 pmThe answer is 27

AdeolaMarch 20, 2015 at 5:39 pm27

Fagbohun ElijahMarch 21, 2015 at 8:01 am27

awesomemayorMarch 22, 2015 at 8:33 am27

awesomemayorMarch 22, 2015 at 8:51 amThere are 3 animals in consideration. A rabbit, a dog and something in form of a kitten.

On d first scale was d kitten like animal and a rabbit and dey jointly weigh 10kg. Figuring out d weight of each animal is impossible at dis point so we’ll look at d next set of animals which happens to be a dog and d same rabbit with a joint weight of 20kg. Won’t want to do some simultaneous equations here but will hit d nail on d head. D addition of both weights is equivalent to 30kg ie 10kg 20kg = 30kg. With our attention fixed on d third weight(d dog and kitten) which equals 24. Hence, 30kg-24kg = 6kg(subtracting d third weight from d addition of d first two weights). Since we av only a don and kitten on d third scale, it sure means dey share 24kg between demselves. And d 6kg goes to d rabbit and since we av d rabbit on two scales we can give d rabbit 3kg(x2 = 6kg) since d rabbit weighs 3kg, on d first scale 10kg – 3kg =7kg and dats for d kitten. For d dog. 20 kg – 3kg=17kg. Wif dat, d 3rd weight is sorted out. For d fourth, just add both 3 7 17(kg) and u’ll get 27kg.

awesomemayor MayowaMarch 22, 2015 at 8:58 amThere are 3 animals in consideration. A rabbit, a dog and something in form of a kitten.On d first scale was d kitten like animal and arabbit and dey jointly weigh10kg.Figuring out d weight ofeachanimal is impossible at dis point so we’ll look at d next set of animals ”dog kitten” with a joint weight of 20kg. D addition of both weights is equivalent to 30kg ie 10kg 20kg = 30kg. With our attention fixed on d third weight(d dog and kitten) which equals 24. Hence, 30kg-24kg = 6kg(subtracting d third weight from d addition of d first two weights). Since we av only a don and kitten on d third scale, it sure means dey share 24kg between demselves. And d 6kg goes to d rabbit and since we av d rabbit on two scales we can give d rabbit 3kg(x2 = 6kg) since d rabbit weighs 3kg, on d first scale 10kg – 3kg =7kg and dats for d kitten. For d dog. 20 kg – 3kg=17kg. Wif dat, d 3rd weight is sorted out. For d fourth, just add both 3 7 17(kg) and u’ll get 27kg.

awesomemayor MayowaMarch 22, 2015 at 8:58 amThere are 3 animals in consideration. A rabbit, a dog and something in form of a kitten.On d first scale was d kitten like animal and arabbit and dey jointly weigh10kg.Figuring out d weight ofeachanimal is impossible at dis point so we’ll look at d next set of animals ”dog+kitten” with a joint weight of 20kg. D addition of both weights is equivalent to 30kg ie 10kg + 20kg = 30kg. With our attention fixed on d third weight(d dog and kitten) which equals 24. Hence, 30kg-24kg = 6kg(subtracting d third weight from d addition of d first two weights). Since we av only a don and kitten on d third scale, it sure means dey share 24kg between demselves. And d 6kg goes to d rabbit and since we av d rabbit on two scales we can give d rabbit 3kg(x2 = 6kg) since d rabbit weighs 3kg, on d first scale 10kg – 3kg =7kg and dats for d kitten. For d dog. 20 kg – 3kg=17kg. Wif dat, d 3rd weight is sorted out. For d fourth, just add both 3 + 7 + 17(kg) and u’ll get 27kg.

AnonymousOctober 9, 2015 at 5:40 pm27 or 28kg

DavidOctober 11, 2015 at 6:04 pm29

Muritala davidOctober 11, 2015 at 6:42 pmThe answer is 29

Sophia AkeleApril 1, 2016 at 6:09 amthe correct answer is 27

Akinlabi Omo-OsoApril 1, 2016 at 4:36 pmRight again!

Lekan AjaniJune 1, 2016 at 11:17 pmFinal Answer 27KG. Kindly see my working as shown below:

Let R represent the Rabbit and S represent the Sheep and D represent the Dog

R= Rabbit, S=Sheep and D=Dog

From the Scale:

Rabbit + Sheep Only =10 kg

R + S = 10——– Equation (1)

Rabbit + Dog= 20 kg

R + D = 20 ——– Equation (2)

And

Dog + Sheep = 24 Kg

D + S = 24 ——– Equation (3)

From Equation (1), make R the subject of Formula, R being the Common Entity;

R + S = 10

R = (10 – S)

Substituting for R in Equation (2), we have

R + D = 20, so,

(10-S) + D = 20

Which becomes

D – S = 20-10

D – S = 10

D = (10 + S) ——– Equation (4)

Now Substituting D from Equtn 4 into Equatn 3

We have ,

D + s = 24 ——– Equation 3

(10 + S) +S =24

2S =24-10

S=14/2

S=7

From the Making of R the initial subject of formula

R = (10 – S)

R = ( 10 – 7)

R = 3

Now that we know the Weight of the Rabbit and that of the Sheep, by usinf equation 4 we have,

D = (10 + S)

D = (10 + 7)

D = 17

By Adding all the (R + S + D ) together we have the Weight of all the animals

Weight of all Animals = R + S + D = (3 + 7 + 17) = 27 Kg

Final Answer: 27 KG

Akinlabi Omo-OsoJune 2, 2016 at 9:14 amFantastic! It’s really obvious that you love Mathematics, and understand its concepts well. Do keep it up!

Lekan AjaniJune 1, 2016 at 11:34 pmMy Initial Post is Solving For Theory in WAEC/GCE , But in a UTM Exam , You need to be smart and use this method

Rabbit + Sheep = 10

Rabbit + Dog = 20

so , 2 Rabits + (1 sheep + 1 Dog) = 30 —-1

and Also

1 Sheep + 1 Dog = 24 —-2

2 R + (24)= 30

R = (30 – 24)/2 = 6/2

R= 3 WEIGHT OF I RABBIT

SO IF 1 SHEEP + I DOG = 24 KG

24 KG + 3 = 27KG , WEIGH OF ALL THE ANIMALS

FINAL ANSWER 27KG