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Maths Puzzle
Numerical Ability
How many liters (L) of a 10% silver iodide solution must be mixed with 7 L of a 4% silver iodide solution to get a 6% solution?
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book Other Question
the conjugate of
sqare_root(2)-square_root(3) is:
square_root(2)+square_root(3).
But can it be:
-sqare_root(2)-square_root(3)?
let f(x) = 1/x+1 + 3/x-5
find all values of "a" for which : f(a) = f(a+6)