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value of x and y?
so 2430=(10x+y)*(10y+x)
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- let xy be a number where x and y are digits so 10x+y represents same number as 10y+x writtem in reverse order
on factorization of 2430 we get factors as = 2 x 5 x 3 x 3 x 3 x 3 x 3
make different combination keeping in mind that if one pair is 10x+y another must represent 10y+x
so let have diffenrent combination= (2 x 5 x 3) x ( 3 x 3 x 3 x 3 )
=30 x 81 (wrong combination)
you may try more until you get the following one
again= (5 x 3 x 3 ) x (2 x 3 x 3 x 3)
= 45 x 54
so here if x= 4 then y=5
or if x=5 then y = 4
so number may be either 45 or 54 answer - 12 years agoHelpfull: Yes(42) No(0)
- an easy approch is.. the result constitutes of 0 in the units digit. this implies that one of the multiplied numbers should definetly contain a 5 in units digit and other number should have a EVEN number in the units digit, by trail and error.. 2 doesn't fit.. hence 4 does. the answer is 45 and 54...
- 12 years agoHelpfull: Yes(11) No(1)
- 2430=100xy+10x^2+10y^2+xy
put the values and get the answer.
x=4,y=5 - 12 years agoHelpfull: Yes(9) No(5)
- 54 and 45 since 54 and 45 are multipied
- 12 years agoHelpfull: Yes(0) No(0)
- from the equation we can say clearly that the required numbers are two digit numbers
roughly estimate the square root of 2430 it's around 46..
for a number to have 0 in units place we should have 5 or 0)0 is not possible since 10's place in second number will not satisfy)
therefore divide 2430 with 45 remainder is 54 yes u struck the answer - 12 years agoHelpfull: Yes(0) No(0)
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