Question

Which is the correct order of the heights of the buildings when arranged in ascending order?

• A. Building 1 < Building 4 < Building 2 < Building 3
• B. Building 1 < Building 4 < Building 3 < Building 2
• C. Building 2 < Building 1 < Building 3 < Building 2
• D. Building 1 < Building 2 < Building 3 < Building 4

Answer 1

The correct option is B Building 1 < Building 4 < Building 3 < Building 2

Say:
1. The heights of four buildings are given.

Steps:
1. What are the heights of the four buildings?
a. 7,339 m, 7,993 m, 7,939 m and 7,399 m. (WB1)
2. What do we need to determine?
a. We need to determine the correct ascending order of heights of the buildings.
3. How will you determine it?
a. By comparing the heights of the buildings
4. Which digits are the same in heights of the buildings?
a. The digits at the thousands place are the same.
5. Which digits we compare to compare the heights, 7,339 m and 7,399 m?
a. We use the digits at the tens place because the digits at the thousands and hundreds place are the same. (WB2)
6. What is the correct ascending order of heights for 7,339 m and 7,399 m?
a. 7,339 m < 7,399 m (WB2)
7. Which digits we compare to compare the heights 7,993 m and 7,939 m?
a. We use the digits at the tens place because the digits at the thousands and hundreds places are the same. (WB3)
8. What is the correct ascending order of heights of 7,993 m and 7,939 m?
a. 7,939 m < 7,993 m (WB3)
9. What will be the final correct ascending order of the heights of the buildings?
a. 7,339 m < 7,399 m < 7,939 m < 7,993 m. As 7,939 m is greater than 7,399 m, digits at hundreds place 9 > 3. (WB4)
10. What will be the correct ascending order of the heights of the buildings?
a. Building 1 < Building 4 < Building 3 < Building 2 (WB4)
Hence, Option B is correct.

WB: