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Maths Puzzle
Numerical Ability
A chemist has 800 grams of a dye solution that is 20% of it original strength. How much dye must be added to increase the strength to 50%?
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Please Help... Two trains left a station traveling in opposite directions at the same rate. One train traveled 372 miles in 1.5 hours more than it took the other train to travel 27
Tell whether the x-value is a soultion of the equation.
ln 2x = 14, x = 2e^14