393 if i am not wrong
15 Answers
39nothing to post. just use congruencies with 10 for each and in end add and subtract accordingly
11thats where my problem is
is it 7+9-8+2-9 ( this is wrong i know)
but please explain congruencies with this example
39then it will become tidious. how come dont u know congruencies?
and watever anirudh gave is by observaion, no congruency
11what is this congruency thing (sorry if i am hrting u, ramanujam sir)?
39nothing anirudh. u know more than me, so i should be asking u not me
11congruences is not in iit jee syllabus (i think so but pretty sure)
but stillis worth knowing i couldnt find it any book i have
can some one gimme links or just explain them to me
11No links pls. Easier to understand if it comes out of another students mouth (or keyboard [3])