exam
Maths Puzzle
Numerical Ability
How many liters of a 20% alcohol solution and a 10% alcohol solution should be mixed to obtain 50 liters of a 12% alcohol solution?
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Can someone please help me with this word problem! Thanks a lot.
If $3000 is invested in an account that pays interest compounded continuously, how long will it take to grow $6000 at 7%?
60% of the area of Rectangle A is the same as 80% of the area of Rectangle B. Rectangle B is 25cm2 smaller than Rectangle A. Given that they both have a length of 25 cm, find the difference in their perimeter.
Rmks: Pls try not to use algebra.