Question

The set {5, 6, 8, 9, 10} is part of a solution set for which inequality?

Answer 1

The four inequalities have the following solutions:

A. $c+14$

B. $c+18\geq 24 \iff c\geq 6$

C. $c+18>24 \iff c>6$

D. $c+14\leq 24 \iff c\leq 10$

Try to match these conditions with your set. For example, option A is surely wrong, because it claims that we only want number which are less than 10, but 10 itself is in our set. Similarly, option B is wrong, because it only allows numbers greater than or equal to 6, but our set contains 5.

Applying this logic, try to see if the answer is C or D!