Riordan, Zane and Tim sold some markers. Tim sold 30% of the total number of markers sold by Zane and Riordan. Riordan sold 20% of the total number of markers sold by Zane and Tim. Riordan sold 170 less markers than Zane. Find the total number of markers sold by all the boys.
| Riordan |
Zane |
Tim |
Total |
| 10x6 |
3x6 |
13x6 |
| 1x13 |
5x13 |
6x13 |
| 13 u |
47 u |
18 u |
78 u |
30% =
30100 =
310 20% =
20100 =
15 The total number of markers is repeated. Make the total number of markers the same. LCM of 13 and 6 is 78.
Number of less markers that Riordan sold than Zane
= 47 u - 13 u
= 34 u
34 u = 170
1 u = 170 ÷ 34 = 5
Total number of markers sold
= 78 u
= 78 x 5
= 390
Answer(s): 390
