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a,b,c and d are natural numbers less than 1000 such that log (base a) b=7/5 and log (base c) d=4/3.Given that d-b=497,what is a+c?

how many values of 'p' satisfy the equation: (log base5 p)^2 +log base5p (5/p)=1 ?

how many values of 'p' satisfy the equation:

how many values of 'p' satisfy the equation:

Find the number of ways in which 5 boys and 5 girls be seated in a row so that no 2 girls may sit together

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two pipes a and b can fill up a half full tank in 1.2hrs.the tank was initially empty.pipe b was kept open for half the time required by pipe a to fill the tank by itself.then, pipe A was kept open for as much time as was required by pipe B to fill up 1/3 of the tank by itself.it was then found that the tank was 5/6 full.the least time in which any of the pipes can fill the tank fully is?

find the wrong no. in this number series.
2 14 91 546 3002 15015

Can i have different types of questions asked on simple interest?

an equilateral triangle whose perimeter= 36cm,is rotated about its side to form a closed solid figure.find the volume of the solid so formed.Explain please how u found the height and radius ?