Best Math Trick I've Ever Learned - Education

Best Math Trick I've Ever Learned - Education - Nairaland

Nairaland Forum › Nairaland General › Education › Best Math Trick I've Ever Learned (2955 Views)

Best Math Trick I've Ever Learned by Eazybay(op): 6:11am On Nov 29, 2018

Ever tried calculating your % share in a deal without using a calculator? It could get really messy and confusing. So here's the trick... Reverse your percentage calculations.

For example, without using a calculator, please tell me, how much is 8 % of 50?
You’re probably thinking, 8/100 x 50. Try to cancel out and then you have 8/10 x 5. Before you do 8 x 5 ÷ 10. Which gives us 4.

Now let's use the reverse percentage trick.

8% of 50 is the same as 50% of 8!
Using the reverse percentage, many of us already know 50% is equal to 1/2. So 50% of 8 is simply 1/2 x 8.
It’s exactly 4.

I didn’t use my calculator.

It holds true for all numbers. Go ahead, try a few.
80 % of 50?
30 % of 25?
In some cases it greatly simplifies the calculation or makes it easier to approximate the result.
Yes, it works with numbers greater than 100. For example, 5 % of 2000 is the same as 2000 % of 5 (20 x 5).

QED.

PS: Register For The 2019 edition of the Campus Metro National Bee and win 1,000,000. Click here to register: www.metrobee.com.ng
Strictly for students of Nigerian Higher Institutions (Universities, Polytechnics, Colleges of Education).
Study materials are available on the website. All questions will come from the study materials.
Registration is 1,000 naira only.
For further Inquiries call: 07069799055

18 Likes 1 Share

Re: Best Math Trick I've Ever Learned by Nobody: 7:23am On Nov 29, 2018

Legend

4 Likes

Re: Best Math Trick I've Ever Learned by Nobody: 9:51am On Nov 29, 2018

King

2 Likes

Re: Best Math Trick I've Ever Learned by abellad: 9:54am On Nov 29, 2018

thank u 4 the info

Re: Best Math Trick I've Ever Learned by farem: 10:11am On Nov 29, 2018

This is one of great info to many sagging and lazy nairalanders

1 Like

Re: Best Math Trick I've Ever Learned by Eazybay(op): 11:40am On Nov 29, 2018

alfadostar:
King

Thanks...

Re: Best Math Trick I've Ever Learned by Eazybay(op): 11:52am On Nov 29, 2018

Lalasticlala let Nairalanders see this o

Re: Best Math Trick I've Ever Learned by heed101(m): 12:33pm On Nov 29, 2018

Only those who are not well groomed in mathematics will accept this as a trick. A×B is the same as saying B×A.

7 Likes

Re: Best Math Trick I've Ever Learned by presented007(m): 12:56pm On Nov 29, 2018

My face when someone is trying to teach me Maths. grin

I can never know that shi**t

7 Likes

Re: Best Math Trick I've Ever Learned by sureteeboy(m): 1:21pm On Nov 29, 2018

Nice one Bro. I never knew

2 Likes 1 Share

Re: Best Math Trick I've Ever Learned by Alejob: 3:33pm On Nov 29, 2018

Thanks for sharing op. I learnt something new! I am the right person to talk to as far as powerbank for your laptop, Phones and LED TV is concerned. See my signature below and recommend. Thanks

1 Like

Re: Best Math Trick I've Ever Learned by schneider87(m): 3:54pm On Nov 29, 2018

Wow... This is a very good o... At least it will reduce our dependence on calculators... Thanks for the info

Re: Best Math Trick I've Ever Learned by OkunrinOloro: 3:59pm On Nov 29, 2018

Eazybay:
Ever tried calculating your % share in a deal without using a calculator? It could get really messy and confusing. So here's the trick... Reverse your percentage calculations.

For example, without using a calculator, please tell me, how much is 8 % of 50?
You’re probably thinking, 8/100 x 50. Try to cancel out and then you have 8/10 x 5. Before you do 8 x 5 ÷ 10. Which gives us 4.

Now let's use the reverse percentage trick.

8% of 50 is the same as 50% of 8!
Using the reverse percentage, many of us already know 50% is equal to 1/2. So 50% of 8 is simply 1/2 x 8.
It’s exactly 4.

I didn’t use my calculator.

It holds true for all numbers. Go ahead, try a few.
80 % of 50?
30 % of 25?
In some cases it greatly simplifies the calculation or makes it easier to approximate the result.
Yes, it works with numbers greater than 100. For example, 5 % of 2000 is the same as 2000 % of 5 (20 x 5).

QED.

PS: Register For The 2019 edition of the Campus Metro National Bee and win 1,000,000. Click here to register: www.metrobee.com.ng
Strictly for students of Nigerian Higher Institutions (Universities, Polytechnics, Colleges of Education).
Study materials are available on the website. All questions will come from the study materials.
Registration is 1,000 naira only.
For further Inquiries call: 07069799055

Re: Best Math Trick I've Ever Learned by maishai01: 4:36pm On Nov 29, 2018

cool

Re: Best Math Trick I've Ever Learned by FrostyButter: 4:49pm On Nov 29, 2018

See front page worthy stuff...

Re: Best Math Trick I've Ever Learned by jumper524(m): 5:30pm On Nov 29, 2018

I swear olodo full nairaland.
Though am not a maths freak but common man, this isn't worthy of being called a trick.

1 Like

Re: Best Math Trick I've Ever Learned by bizza45: 6:22pm On Nov 29, 2018

cool

Re: Best Math Trick I've Ever Learned by CustardPrince(m): 7:17pm On Nov 29, 2018

Instead of doing 2 x 1 = 2
With my maths trick I'll do 1 x 2 = 2
See, no calculator

Re: Best Math Trick I've Ever Learned by TheGoodJoe(m): 7:30pm On Nov 29, 2018

heed101:
Only those who are not well groomed in mathematics will accept this as a trick. A×B is the same as saying B×A.

As in eh!!! grin

Surely OP was one hell of a poor maths student. grin

Re: Best Math Trick I've Ever Learned by acenazt: 7:41pm On Nov 29, 2018

presented007:
My face when someone is trying to teach me Maths. I can never know that shi**t

bros d thing dey frustrate me gaaan

Re: Best Math Trick I've Ever Learned by CyberEBOLA(m): 8:11pm On Nov 29, 2018

GOOD! NOW USE THE TRICK FOR 27% OF 33763255 WITHOUT CALCULATOR.

Re: Best Math Trick I've Ever Learned by tetralogyfallot(m): 8:19pm On Nov 29, 2018

Lolz! Op just succeeded in making it more complex.

Re: Best Math Trick I've Ever Learned by IjebuWarrior: 8:31pm On Nov 29, 2018

Well, I've also got one for my fellow mathematicians in the house...

Do you know anything multiplied by '11' is simply adding the two integers and putting the result in the middle? cool

11 x 11 = 1+1 = 2; Thus... 1 2 1
11 x 34 = 3+4 = 7; Thus... 3 7 4
11 x 27 = 2+7 = 9; Thus... 2 9 7

Argue with your keyboard... angry

Thank me later cool

3 Likes 1 Share

Re: Best Math Trick I've Ever Learned by MrSix: 9:11pm On Nov 29, 2018

Those days way I been dey tear mathematics take use as toilet paper. No quote me, unless you're grounded in mathematics.

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Nation wide delivery
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Re: Best Math Trick I've Ever Learned by ayodijex(m): 11:02pm On Nov 29, 2018

heed101:
Only those who are not well groomed in mathematics will accept this as a trick. A×B is the same as saying B×A.

My brother me sef weak. Lol

Re: Best Math Trick I've Ever Learned by Nobody: 1:04am On Nov 30, 2018

heed101:
Only those who are not well groomed in mathematics will accept this as a trick. A×B is the same as saying B×A.

Well I didn't know the commutative law applies to percentages

Re: Best Math Trick I've Ever Learned by Nobody: 6:19am On Nov 30, 2018

An educative thread like this will not make FP but if it were to be anything about Tonto Dike, Toke Makinwa & Bobrisky, it would.

1 Reply

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