Q. If 2^x=3^y=6^z, Prove that: 1/x+1/y=1/z.

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Simplify: Soln: ...
Q. The sum of the ages of a father and his son is 40 years.If they both live until the son becomes as old as the father is now, the sum of their ages will be 96 years . Find their present ages. The sum of the ages of a father and his son is 40 years.If they both live until the son becomes as old as the father is now, t ...
Bibha said to Bigyata," I'm twice as old as you were when I was as old as you are.". If the sum of their present age is 35 years. Find the present ages. Soln: ...
The sum of the digits of two-digits number is 10. If 18 is added to the number , its digits are reversed. Find the number. Soln: Let the two digits number = 10x +y where tens place digit = x units place digit = yaccording to the first conditionx+y = 10.. ...
In the given figure, O is the center of the circle. If ABOC is a rhombus, find the value of angle BAC. Soln: if angle BOC=x then reflex angle BOC=360-xnow angle BAC=(1/2) reflex angle BOC=180-x/2thenangle BAC=angle BOCx=180-x/2x=120 ...