Question

You have 2 numbers: eighty-seven and seventy-eight. Which of the two is larger? Find the difference between them.

• A. 87, 9
• B. 78, 19
• C. 87, 11
• D. 78, 9

Answer 1

The correct option is A

87, 9

Eighty-seven is nothing but 87 in words. Similarly, Seventy-eight is 78.

In the number 87, we have 8 at the tens' place and 7 at the ones' place.

And, in 78, we have 7 at the tens' place and 8 at the ones' place.

When we compare two numbers, we start from the left. So comparing 87 and 78 we start from the tens place. In 87, 8 is at the tens' place. In 78, 7 is at the tens' place. Clearly, 8 is greater than 7, or 8 > 7.

Thus, it can be concluded that 78 < 87. Finding the difference between them: 87 - 78 = 9