Discussion
In the following question, by using which mathematical operator will the expression become correct?
18 ? 6 ? 9 ? 27
Answer: B
Correct answer: ÷, x and =
Putting the operators in as ÷, × and = gives \[ 18 \div 6 \times 9 = 3 \times 9 = \mathbf{27} \] which is what the right-hand side requires.
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