1hmm... mereko ek doubt yaad aya!
find last three digits of (17)256.
plz hlp in this one.
The last digit of (2137)754 is.....
plz help me ...i dunno how to solve this kinds of question....[2]
i want to learn this type....
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UP 0 DOWN 0 0 9
9 Answers
13dunno ...the ans ..may b u r rite....
plz teach me....how to do these....
1how i did:
(2130 + 7)754
= 7754 + 10m
now 7x7=49
x7 = 343
x7 =(...)1 .. i mean last digit 1
so it repets after every 4th poewers.
but 754 is not a multiple of 4 and its two less ... dat means last digit shud be 9.
622137754
last digit is same as
7754 (Is it obvious?)
Now 7^2 = 49... last digit is (-1)
Now 7^4 = xxxkljxl .. last digit is (-1)^2 =1
7752 has last digit 1
multipy by 49 last digit is 9
113all that i have learnt is to find the last digit....which is 1 [3]
62yes I thinkthat part is very stupid..findinglast 2 - 3digits..
I dont see a goodmethod.
