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How To Calculate Quickly And Correctly In Mathematics - Education - Nairaland

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How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 7:03pm On May 28, 2013
To square any number which is between 25-50.say 46.say 46-25(the lower range)=21.then say 50(the higher range)-46=4 and square the four to give 16.take the two together to get 2116...let's try that of 48.you say 48-25=23.then 50-48=02 and square it to give 04.take it together to get 2304
J.Rika:
Try dat of 30. got a wrong answer.
...

1 Like

Re: How To Calculate Quickly And Correctly In Mathematics by Emmyk(m): 7:35pm On May 28, 2013
I'm done with statistics oo. cheesy.. Statistics fu n mass communicator.. Jor oo
Re: How To Calculate Quickly And Correctly In Mathematics by Sodiq3(m): 9:38pm On May 28, 2013
Emmyk: I'm done with statistics oo. cheesy.. Statistics fu n mass communicator.. Jor oo

wrap me on 2go let's communicate...am also a 100lstdnt of mass communication, Ahmadu bello university,zaria..

1 Like

Re: How To Calculate Quickly And Correctly In Mathematics by Emmyk(m): 4:07pm On May 29, 2013
What's ur username. Kogi State Uni, 200level.
Re: How To Calculate Quickly And Correctly In Mathematics by JRika(f): 5:07pm On May 29, 2013
Try dat of 30. got a wrong answer.
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 2:24pm On Jun 01, 2013
Sodiq3:
wrap me on 2go let's communicate...am also a 100lstdnt of mass communication, Ahmadu bello university,zaria..
.ok...add me with mathemagician on 2go
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 2:27pm On Jun 01, 2013
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Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 2:43pm On Jun 01, 2013
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Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 9:32am On Jun 02, 2013
To multiply any number by 5,50,500 etc...let's use a manipulation as this...5=10/2.so assuming you want to multiply 448 by 5.just divide 448 by 2 and add a nought...therefore 448/2=224.then add a nought to give 2240.assuming you want to multiply 363 by 50...divide 363 by 2 and add 2 noughts.363/2=181.5 and add 2 noughts to give 18150...
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 9:36am On Jun 02, 2013
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Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 7:37am On Jun 03, 2013
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Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 7:42am On Jun 03, 2013
Pls.nairalanders.i want you to post more of this...if you don't know any...just type your comment to impress those that are typing it...there are still many more of these...i still lay emphasis on square,if you show that you like this thread...i will post multiplication to the extent that you can go to the examination hall without calculator...also need a magic to know trig. Functions sin and cos offhand.just comment on this thread...

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Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 7:13pm On Jun 07, 2013
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Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 8:58pm On Jun 07, 2013
Nice one bro. . . .keep it up!
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 8:42pm On Jun 16, 2013
To know if a number is divisible by 9...just add the numbers together,if it's a multiple of 9.then 9 will surely go in it...e.g.747...you say 7+4+7=18...18 is a multiple of 9...then 9 is a factor of 747...what about 735...add the numbers 7+3+5=15...15 is not a multiple of 9...therefore 9 is not a factor of 735.THE SAME RULE APPLY FOR 3...THEREFORE 735 IS A MULTIPLE OF 3 BECAUSE 15 IS A MULTIPLE OF 3
Re: How To Calculate Quickly And Correctly In Mathematics by simeonabio(m): 8:51pm On Jun 16, 2013
visit www.mathsvillage.org today for solution to maths past question
Re: How To Calculate Quickly And Correctly In Mathematics by Forzap: 10:52pm On Jun 16, 2013
Ride on guru
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 12:09am On Jun 17, 2013
Calculusf(x):
To know if a number is divisible by 9...just add the numbers together,if it's a multiple of 9.then 9 will surely go in it...e.g.747...you say 7+4+7=18...18 is a multiple of 9...then 9 is a factor of 747...what about 735...add the numbers 7+3+5=15...15 is not a multiple of 9...therefore 9 is not a factor of 735.THE SAME RULE APPLY FOR 3...THEREFORE 735 IS A MULTIPLE OF 3 BECAUSE 15 IS A MULTIPLE OF 3

Does this also apply to all numbers?
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 9:22am On Jun 18, 2013
Ortarico:

Does this also apply to all numbers?
...not all bro,we will meet at 2go to sort the remaining
Re: How To Calculate Quickly And Correctly In Mathematics by Omosivie1(f): 9:29am On Jun 18, 2013
Hi, pls can u teach me how to multiply numbers in different bases apart from base 10? I really need it.
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 10:31am On Jun 18, 2013
Omosivie,:
Hi, pls can u teach me how to multiply numbers in different bases apart from base 10? I really need it.
...base 10...is generally use by everyone...but when i get any trick for any other base,i will let you know
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 10:35am On Jun 18, 2013
Calculusf(x):
...not all bro,we will meet at 2go to sort the remaining

All right Prof
Re: How To Calculate Quickly And Correctly In Mathematics by Omosivie1(f): 11:41am On Jun 18, 2013
Calculusf(x):
...base 10...is generally use by everyone...but when i get any trick for any other base,i will let you know
Ok, thanks. Can u pls help me out with this question: Simplify log 25^x(base 5) - log0.04(base 5).
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 12:27pm On Jun 18, 2013
Omosivie,:
Ok, thanks. Can u pls help me out with this question: Simplify log 25^x(base 5) - log0.04(base 5).

Lemme help you....
Log525x - log5
log552(x) - log5(4/100)
2xlog55 - log5(1/25)
2x*1 - (log55/log552
2x - 1/2 = 0
2x = 1/2
x = 1/4

1 Like

Re: How To Calculate Quickly And Correctly In Mathematics by Omosivie1(f): 1:01pm On Jun 18, 2013
Ortarico:

Lemme help you....
Log525x - log5
log552(x) - log5(4/100)
2xlog55 - log5(1/25)
2x*1 - (log55/log552
2x - 1/2 = 0
2x = 1/2
x = 1/4
Thanks, but ur answer is not among the options. The options are:
A 2x+1
B 2x+2
C x/2
D 2x-2.
I hope u can understand my workings cos i don't know how to use subscript and superscrpit on nairaland cos i'm on mobile. Log25^x(base 5) - log 4/100(base 5)
log5^2x(base 5) - log 5^-2(base 5)
NB: log5(base 5) = 1.
2x-(-2)
2x+2. My final answer is 2x+2 but the textbook says it's 2x-2. Can u pls point out my mistake?

1 Like

Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 2:47pm On Jun 18, 2013
Omosivie,:
Thanks, but ur answer is not among the options. The options are:
A 2x+1
B 2x+2
C x/2
D 2x-2.
I hope u can understand my workings cos i don't know how to use subscript and superscrpit on nairaland cos i'm on mobile. Log25^x(base 5) - log 4/100(base 5)
log5^2x(base 5) - log 5^-2(base 5)
NB: log5(base 5) = 1.
2x-(-2)
2x+2. My final answer is 2x+2 but the textbook says it's 2x-2. Can u pls point out my mistake?
...you are very right bro with what you did,i can't say the textbook is wrong,maybe it's typographical error,i mean the answer the textbook provided but your answer is right...
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 3:02pm On Jun 18, 2013
Omosivie,:
Thanks, but ur answer is not among the options. The options are:
A 2x+1
B 2x+2
C x/2
D 2x-2.
I hope u can understand my workings cos i don't know how to use subscript and superscrpit on nairaland cos i'm on mobile. Log25^x(base 5) - log 4/100(base 5)
log5^2x(base 5) - log 5^-2(base 5)
NB: log5(base 5) = 1.
2x-(-2)
2x+2. My final answer is 2x+2 but the textbook says it's 2x-2. Can u pls point out my mistake?

Yes you're right, cause with the options it's easier to work out what/how the examiner wants the equation to be.
Re: How To Calculate Quickly And Correctly In Mathematics by oyestephen(m): 3:23pm On Jun 18, 2013
@ortarico @calculus i'm very proyd of u both. I'll love to meet you both in persons
Re: How To Calculate Quickly And Correctly In Mathematics by Omosivie1(f): 4:10pm On Jun 18, 2013
Thanks, I still have some questions i'd like u guys to solve. Can I post them here?
Re: How To Calculate Quickly And Correctly In Mathematics by Calculusfx: 5:52pm On Jun 18, 2013
Omosivie,:
Thanks, I still have some questions i'd like u guys to solve. Can I post them here?
...don't worry sister,if you have any other question,just type it...we will try our best...but remember nobody is an iceland of knowledge...
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 6:07pm On Jun 18, 2013
oyestephen: @ortarico @calculus i'm very proyd of u both. I'll love to meet you both in persons

Thanks boss. By God's grace we'll meet at the university of first choice...
Re: How To Calculate Quickly And Correctly In Mathematics by Ortarico(m): 6:15pm On Jun 18, 2013
Omosivie,:
Thanks, I still have some questions i'd like u guys to solve. Can I post them here?

You can. We'll help with the help of God!

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