CAT Exam

the number obtained by intertchanging the two dogots of a two digit number is less than the original number by 27.if the difference between the two digits of the number is 3.what is the original number?

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Ans:63
Data insufficient so we have to guess
let unit digit be x,tens digit be y
number 10y+x
if reversed then no. = 10x+y
given
10x+y+27=10y+x
9y-9x=27
y-x=3
11 years agoHelpfull: Yes(1) No(0)

It can be 41,52,74,85,96 also
11 years agoHelpfull: Yes(1) No(0)

CAT Other Question

a man buys an article for Rs 80 and marks it for Rs 120.he then allows a discount of 40%.what is the loss or gain per cent? 16 litres of mixture contains milk and water in the ratio 5:3.if 4 litres of this mixture is replaced by 4 litres of milk,the ratio of water to milk in the new mixture will become: