Which two numbers should be interchanged to make the given equation correct?
$$28+ 49-35 \div 7 \times 4=68$$
$$28+ 49-35 \div 7 \times 4 = 68$$
From option A,
On interchanging,
$$35 + 49-28 \div 7 \times 4 = 68$$
$$35 + 49 - 16 = 68$$
68 = 68
$$\therefore$$ The correct answer is option A.
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