10%+30%=40%
10 + 10 + 20 + 20 +20 = 80.
The correct answer is: 1000+40+1000+30+1000+20+1000+10 = 4100
40
40
40
40
40
15 minutes after 10:30 is 10:45. This is because you add 15 minutes to the original time of 10:30. To calculate this, you can add 10 minutes to get to 10:40, and then add another 5 minutes to reach 10:45.
10
40
1000 + 1000 + 1000 + 1000 + 40 + 30 + 20 + 10 = 4100