actually there will be no R(n)which is a perfect square...cz a no ending wd 1 is a perfect square if it is ending wd 1 or 9.....nd we knw dt square of (......9)=(.......even 1) square of (......1)=(.......even 1) i.e. square of ny no. ending wid 9 or 1 will hv 1 at d end place and an even digit preeceding 1...bt in R(n)ds condition ds nt hold....
3 comments:
answer: zero
yes nidhi u r correct...nw suppose there is no limit 4 n....dn wt shud be d ans...
actually there will be no R(n)which is a perfect square...cz a no ending wd 1 is a perfect square if it is ending wd 1 or 9.....nd we knw dt
square of (......9)=(.......even 1)
square of (......1)=(.......even 1)
i.e. square of ny no. ending wid 9 or 1 will hv 1 at d end place and an even digit preeceding 1...bt in R(n)ds condition ds nt hold....
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