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Nairaland Forum / Nairaland / General / Education / Easy Way To Find The Square Of Number Between 1-100 By Heart (18860 Views)
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Easy Way To Find The Square Of Number Between 1-100 By Heart by fxjones(m): 7:11pm On Jul 23, 2014 |
hello fellow mathemacians, just discover this while manipulating numbers, in class how you quickly find the square of numbers without lifting a finger. eg find the square of 15? u can quickly do this without using calc or writing down just say: 1*1+1 = 2 then find 5*5 = 25 lastly combine them together = 225 example 2 find the square of 25 again: 2*2+2 =6 then 5*5 again = 25 join them together = 625 example 3: find the square of 75 again you say 7*7+7 = 56 and 5*5 = 25 finally join them together as we did before = 5625 this formula only work for numbers between 1-100 and the last number must end with 5 I will post the formula for other range: keep rocking! 126 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by adioolayi(m): 7:25pm On Jul 23, 2014 |
Have learnt a new thing ...thank u Oh my God ! Na so FTC easy reach.....wow! Two topics at a time...I tell you, just waking to see this. I am so happy! Thanks @Op....Thanks @Mod.......@Oga Seun..thnk you for this forum...God bless! My wife Oluwabukola...I love you 11 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 7:26pm On Jul 23, 2014 |
FolLowing... |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 8:03pm On Jul 23, 2014 |
fxjones: hello fellow mathemacians, wow nice 1 bro......the spirit is 1 dsame tin av bin workin on too really learnt from this ....m working & thinking of finding roots of integers quicker & also multiplying /diving >3 digit numbers without calculator , our brain is a potential calculator just that sometyms we feel lazy to put it to work , .. i"ll also share my discovery later ... 10 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by ignis: 9:25pm On Jul 23, 2014 |
Nice discovery. ... |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by iluvweed(m): 9:31pm On Jul 23, 2014 |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by opeano(m): 9:37pm On Jul 23, 2014 |
As much as u tried and deserv kudoz, ur logic isnt absolute. U should av made ur topic more specific by saying, getting squares of numbers that ends in 5 and below 10. Cos wt ur formula, 63*63 gives 3969 which is different when one use ur style. Nice work anyway 12 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by JayTeeA(f): 10:08pm On Jul 23, 2014 |
1 Like |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by adioolayi(m): 10:11pm On Jul 23, 2014 |
opeano: As much as u tried and deserv kudoz, ur logic isnt absolute. U should av made ur topic more specific by saying, getting squares of numbers that ends in 5 and below 10. Cos wt ur formula, 63*63 gives 3969 which is different when one use ur style. Nice work anywayProf Einstein.. Read again..the Op said the number must end with 5!.....try 65. 15 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 11:21pm On Jul 23, 2014 |
Nyc 1 op. Biko, help me find square of 23.12 with ur method. I dey wait 6 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Graviton2(m): 11:36pm On Jul 23, 2014 |
Good job, OP. I'm following. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by shoturtrap(m): 12:03am On Jul 24, 2014 |
Ok here's this one. Any two digit number multiplied by 11 just add the number and put it in between the original numbers if ur answer is a two digit number add the first number to the original first digit. Example 25 x 11 = 2 (2+5) 5= 275 32 x 11 = 3 (3+2) 2= 352 86 x 11 = 8 (8+6) 6= 8(14)6 Add first number of the answer to the original first digit = 946 79 x 11 = 7 (7+9) 9= 7(16)9= 869. 10 x 11 = 1 (1+0) 0= 110 So that's one short or simple way I used back then in the primary school to quickly solve maths problems involving the 11 multiplication table. 24 Likes 1 Share |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by barackodam: 12:49am On Jul 24, 2014 |
Cool. WTF??.??.?? . front page while am still awake. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by iluvpomo(m): 1:14am On Jul 24, 2014 |
@fxjones Thanks and very cool indeed ..... I am going to use this to try and impress some hot girls in my area .... i hope it gets me lucky 1 Like |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 1:14am On Jul 24, 2014 |
Cool. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Sagytarius(m): 1:15am On Jul 24, 2014 |
shoturtrap: Ok here's this one. ...for your mind now... 3 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 1:17am On Jul 24, 2014 |
Interesting. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by onose1(f): 1:18am On Jul 24, 2014 |
Impressive... 1 Like |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by barackodam: 1:18am On Jul 24, 2014 |
iluvpomo: @fxjones Thanks and very cool indeed ..... I am going to use this to try and impress some hot girls in my area .... i hope it gets me lucky Baddo |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by pomide(m): 1:19am On Jul 24, 2014 |
oh...nice one. Buh who still does square root maths?? |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Olarewajub: 1:19am On Jul 24, 2014 |
Interesting... |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by barackodam: 1:19am On Jul 24, 2014 |
Sagytarius: , vicdayo: . Busted!!!. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by otalenu(m): 1:23am On Jul 24, 2014 |
This is awesome. |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Project400: 1:23am On Jul 24, 2014 |
Nice discovery! |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by chuxyz(m): 1:28am On Jul 24, 2014 |
OP it only works for very few numbers within that range. For example try 12 * 12 and see that it won't work |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Sagytarius(m): 1:28am On Jul 24, 2014 |
barackodam:Taaa!!!! Bust for whia!? Shey I be bulom bulom? |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Nobody: 1:28am On Jul 24, 2014 |
barackodam: Nairaland police uhn? |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Lenzz(m): 1:29am On Jul 24, 2014 |
Nice one. If its truly your discovery, then why not explore d option of patenting it cos I think its brilliant. BUT that's only if this is your original work o |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by topsy1971: 1:29am On Jul 24, 2014 |
Nice reminder. Have been using it since late 80s. 1 Like |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by herald9: 1:29am On Jul 24, 2014 |
This is cool lemme copy nd paste in ma memory |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by Adesam01(m): 1:30am On Jul 24, 2014 |
Busted! Your Example... find the square of 25 again: 2*2+2 =6 then 5*5 again = 25 join them together = 625 My Problem! find the square of 11 again: 1*1+1 =2 then 1*1 again = 1 join them together = 21 (Actual answer --> 11^2 = 121) Same for 12 - 14 I conclude that to every rule or scientific formulation, there is a loop hole 4 Likes |
Re: Easy Way To Find The Square Of Number Between 1-100 By Heart by olamikhail(m): 1:30am On Jul 24, 2014 |
opeano: As much as u tried and deserv kudoz, ur logic isnt absolute. U should av made ur topic more specific by saying, getting squares of numbers that ends in 5 and below 10. Cos wt ur formula, 63*63 gives 3969 which is different when one use ur style. Nice work anyway squares of numbers between 10 n 100 that end in 5.(the formulae doesnt work for 5;i stand to b corrected) Or squares of 2 digit numbers that end in 5.. Op take note 2. All in all ,its a 9c post.kip it up. 2 Likes |
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