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AravindG
Group Title
Note:This is not a question !!
Tutorial 2
Topic:Maths tricks (contd)
hope you like it .Do give ur feedback!
 one year ago
 one year ago
AravindG Group Title
Note:This is not a question !! Tutorial 2 Topic:Maths tricks (contd) hope you like it .Do give ur feedback!
 one year ago
 one year ago

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AravindG Group TitleBest ResponseYou've already chosen the best response.9
Square of any 2 digit number __________________________ Let me explain this trick by taking examples 67^2 = [6^2][7^2]+20*6*7 = 3649+840 = 4489 similarly 25^2 = [2^2][5^2]+20*2*5 = 425+200 = 625 Take one more example 97^2 = [9^2][7^2]+20*9*7 = 8149+1260 = 9409 Here [] is not an operation, it is only a separation between initial 2 and last 2 digits Here an extra case arises Consider the following examples for that 91^2 = [9^2][1^2]+20*9*1 = 8101+180 = 8281 nice isnt it ?
 one year ago

DHASHNI Group TitleBest ResponseYou've already chosen the best response.0
yeah !!! but is it applicable for every N ?
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.9
holds for N upto 100 ...
 one year ago

DHASHNI Group TitleBest ResponseYou've already chosen the best response.0
N natural numbers?
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.2
any good reason ? if you can give ?
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.2
well i may add,,hope you dont mind (afterall its your tutorial) we have (10 a + b)^2 = 100a^2 + b^2 + 20.a.b a and b both are single digits,,max value b^2 can take is 81.. 2 0's are there in the end when 100 gets multiplied by a^2 and hence is the trick..
 one year ago

DHASHNI Group TitleBest ResponseYou've already chosen the best response.0
thats brillliant
 one year ago

goformit100 Group TitleBest ResponseYou've already chosen the best response.0
@AravindG jahapana tussi great ho TOFA KUBUL KARO.... :)
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
hmm haven't seen these things for months....
 one year ago

shreya. Group TitleBest ResponseYou've already chosen the best response.1
well, i find this trick much easier, to find the square of any 2digit no. suppose 10x+y 1. add the unit's digit to the no., ie. 10x+y+y 2.multiply the result with the ten's digit as: , (10x+2y)*(10x) 3. add the square of the unit's digit to the result obtained after doing the 2nd step. and you'll get the desired square. eg. \[43^{2}= (43+3)(40)+9=1849\]
 one year ago

shreya. Group TitleBest ResponseYou've already chosen the best response.1
btw @AravindG your tricks are awesome :)
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.9
@shreya. thanks :) ...that trick is new to me and its interesting ! Thanks for sharing !
 one year ago
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