exam Maths Puzzle Numerical Ability

Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not? Give examples.

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exam Other Question

The intake pipe can fill a tank in 4 hours when the outlet pipe is closed, but with the outlet pipe open it takes 6 hours. How long would it take the outlet pipe to empty a full tank? one number is equal to two times a second number. two time the first number plus two times the second number is 24. if you let x stand for the first number and y for the second, what are the two number.