exam Maths Puzzle Numerical Ability

A chemist wants to mix a 60% saline solution with 20 liters of a 45% saline solution to obtain a 55% saline solution. How much of the 60% solution should she use?

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exam Other Question
The lesser of two consecutive even integers is 10 more than one-half the greater. What are the integers? Can you tell me how to do this




5. Fill in the chart given this linear equation:
3x + y =10
x y=
-2
-1
0
1
2