Samrud had to multiply a number by 35. By mistake he multiplied by 53 and got a result 720 more. The new product is

Correct Answer: 2120

Solution

Let the number be $$x$$. The mistake gives $$53x - 35x = 720$$, so $$18x = 720$$ and $$x = 40$$. The new (mistaken) product is $$53 \times 40 = 2120$$.

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