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How many integers n greater than and less than 100 are there such that,if the digits of n are reversed,
the resulting integer is n+9 ?
(A)5 (B)6 (C)7 (D)8 (E)9
Read Solution (Total 6)
-
- (10x+y)=(10y+x)+9
=> 9x-9y=9
=> x-y=1
and only 8 numbers satisfy this condition and the numbers are 21,32,43,54,65,76,87,98 - 12 years agoHelpfull: Yes(46) No(5)
- (10x+y)=(10y+x)+9
=> 9x-9y=9
=> x-y=1 - 12 years agoHelpfull: Yes(13) No(2)
- 89,78,67,56,45,34,23,12
Ans -8 - 13 years agoHelpfull: Yes(12) No(2)
- ANS: D
The Numbers are
12, 23, 34, 45, 56, 67, 78 and 89 - 12 years agoHelpfull: Yes(4) No(1)
- the answer is 9
the number is
01,12,23,34,45,56,67,78,89 - 12 years agoHelpfull: Yes(4) No(13)
- i think 9 bcoz mulitiples of 9 assume n be 9 then mulitples of 9 upto 81
- 12 years agoHelpfull: Yes(0) No(13)
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