Question

Manish multiplied 100 by 89 instead of multiplying by 79. How much was his answer greater than the correct answer?

• A. None of these
• B. 100
• C. 10000
• D. 1000

Answer 1

The correct option is D 1000

Let us multiply both 89 and 79 by the number 100
i.e, 100 × 89 = 8900
100 × 79 = 7900
To find how much was his answer greater than the correct answer. we have to subtract 7900 from 8900:

8900
– 7900
------
1000
------
Hence, the number is greater by 1000 than the correct answer.