11sorry i dont have answer
do post ur methods or provide hints
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])