exam Maths Puzzle Numerical Ability

Suppose you make and sell lotion. A quart of regular skin lotion contains 2 c oil and 1 c cocoa butter. A quart of extra-rich skin lotion contains 1 c oil and 2 c cocoa butter. You

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Line l goes through (2,5) and is parallel to the x-axis This question is really hard and I need a lot of help!

Researchers marked and released 36 pike in a pond. Later they counted 20 pike, 12 of which were marked. Estimate the pike population. See I got the answer 60 is that right or am I wrong?