Question

Rainbow Robots Inc was demonstrating window washing. The big red robot washed half of the windows in the building, the green robot washed two-thirds of the windows, the blue robot washed one-half of the remaining windows, and finally, the yellow robot washed the last 10 windows. How many windows did they wash together?

A) 10 windows
B) 15 windows
C) 20 windows
D) 25 windows

Answer 1

The rainbow robots washed a total of 25 windows.

Step-by-step explanation:

To find the total number of windows washed by the rainbow robots, we need to calculate the number of windows washed by each robot and then add them together.

1. The big red robot washed half of the windows, so it washed 1/2 of the total number of windows.
2. The green robot washed two-thirds of the remaining windows, which is equal to 2/3 times the other half (1/2) of the total number of windows.
3. The blue robot washed one-half of the remaining windows, which is equal to 1/2 times the remaining windows after the red and green robots washed.
4. Finally, the yellow robot washed the last 10 windows.

To find the total number of windows, we add up the number of windows washed by each robot: 1/2 + (2/3)*(1/2) + (1/2)*(1/2) + 10 = 25 windows.

Therefore, the rainbow robots washed a total of 25 windows.