exam Maths Puzzle Numerical Ability

sum of the digit of two digit no. is 12. the given no. exceed the no. obtained by interchange the digit by 36. find the given no.

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solve the given fractional equations. A. 4-a/1-a=12/3-a+1 B. 2x+7/14-x+6/7=5x-4/3x+1 . simplify the given complex fractions using the method you prefer. A. 1-A/A^1-1= B. x-x^2-1/x / 1-x-1/x= The number of germs in a dish after t minutes is given as B=25e^(kt). If there are 2191 germs present after 6 minutes, find k (round out to 4 places).