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how many numbers between 25 and 400 are divisible by 11? what is their sum?
 one year ago
 one year ago
how many numbers between 25 and 400 are divisible by 11? what is their sum?
 one year ago
 one year ago

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amistre64Best ResponseYou've already chosen the best response.1
well, it starts with the number 33
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
can u pls show the equation sir???
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
40025 = 375 possible results divide that by ll 375/11 = 34.1 so ill assume there is like 34 numbers in that
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
and the sum sir?
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
there sum can be determined by the expression 33+11n from n=0 to 34 most likely
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
wait sir... 33+11n=????
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
34 11  34 34  374 11  385 11  396 .... found a few more
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
pfft, for got to add 33 :) 374 +33  407 so it looks like 34 is too large and 33 is perfect 0 to 33
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
this time i am right i double checked it
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
can i ask for the solution sir??? because the solution is greatly needed
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
33+11n i s a good expression yes since the first number divisible by 11 is 33
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
how to get the n sir???
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
\[\sum_{0}^{33}33+11n=\frac{33}{2}(33+374)\]
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
a=33 l=396 d=11 n=(39633/11)+1=35 sum=(35)(2(33)+34(11))/2 =7480 use the formula i gave u earlier
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=table+%2833%2B11n%29%2C+n%3D0..33
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
thanks to to all of you friends :D
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
why is sambhav answer is different?
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
he most likely has a small error, or i do. but ive got the wolf to dbl chk me :) http://www.wolframalpha.com/input/?i=sum+%2833%2B11n%29%2C+n%3D0..33
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
hey @amistre64 ur formu;lla is correctbut ∑03333+11n=332(33+374) =6715.5
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
yeah, 374 should have been 396 :) but i accounted for that afterwards
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
you used another website for help i used my mind
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
at my age, the mind is not so good ;)
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
whats the correct answer monsieurs???
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
i have to look at my left foot just to remember what color sock i need to put on the right foot :)
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
∑03333+11n=(35/2)(33+396)=7507.5
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
whats ur age @amistre64
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
sambhav and amistre what again is the answer???
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
pls wait for a minute pls sorry for the argument between us
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
its just ok no hard feelings
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
0 to 33 is 34 numbers entotal 34(33+396)/2 = 7293
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
its right tnx for all your help ive got 2 numbers to go can u cooperate me or help me sir???
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
between the both of us, we are sure to work out all the wrinkles ;)
 one year ago

sambhav__jainBest ResponseYou've already chosen the best response.1
@bienes_joshua the write answer is 7293
 one year ago

bienes_joshuaBest ResponseYou've already chosen the best response.0
much thanks of all your help i just need to finish the 2 problems i will close this question and write a new one :D
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
starting an index at 1 makes life easier on the count but adds a little bit of complexity to the expression; therefore a modification that is equal is:\[\sum_{1}^{34}33+11(n1)\]
 one year ago
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