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Number System
8+88+888+8888...upto 24 terms.
what are the last three digits?
Read Solution (Total 4)
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- 8+88+888+8888...upto 24 terms
simply add
unit digit=(8+8+8+... 24 times)= 24*8=192,
unit digit=2, carry=19
tenth digit=(8+8+...23 times)+19=184+19=203,
tenth digit=3, carry=20
hundredth digit=(8+8+...22 times)+20=176+20=196,
hundredth digit=6 & so on
last three digits= 632 - 10 years agoHelpfull: Yes(133) No(3)
- simply multiply...
8*24=192(2 unit digit and 19 carry)
8*23=203(3 unit digit and 20 carry)
8*22=196(6 unit digit and 19 carry)
ans=632. - 10 years agoHelpfull: Yes(6) No(0)
- In unit's place there are 24 8's so,24*8=192
in ten's place 23 8's so,23*8=184
in 100's place 22 so,22*8=176
therefore 632 = (176+20=196)6 (184+19=203)3 (192)2 - 10 years agoHelpfull: Yes(1) No(0)
- simply visualise we have to calculate last three digit so digit before last three is of no use now we will be having 8+88+888+888+888+888+888 upto 24term so we are having 2 term who are not having 8 in all three do keep them aside now 22 term will be having 888 so 888*22 last three digit 536 now add 88 and 8 in it so we will get 632
- 10 years agoHelpfull: Yes(0) No(0)
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