Which two signs or numbers need to be interchanged to make the following equation correct?
$$(18 \div 9) + 9 \times 8 = 24$$
By Trial and Error method,
Option A
$$(18\div9)\times9+8=24$$
$$2\times9+8=24$$
$$18+8=24$$
$$26=24$$
Hence Option A is incorrect
Option B
$$(18+9)\div9\times8=24$$
$$27\div9\times8=24$$
$$3\times8=24$$
$$24=24$$
Hence, the correct answer is Option B
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