Ian, David and Pierre sold some markers. Pierre sold 40% of the total number of markers sold by David and Ian. Ian sold 10% of the total number of markers sold by David and Pierre. Ian sold 82 less markers than David. Find the total number of markers sold by all the boys.
| Ian |
David |
Pierre |
Total |
| 5x11 |
2x11 |
7x11 |
| 1x7 |
10x7 |
11x7 |
| 7 u |
48 u |
22 u |
77 u |
40% =
40100 =
25 10% =
10100 =
110 The total number of markers is repeated. Make the total number of markers the same. LCM of 7 and 11 is 77.
Number of less markers that Ian sold than David
= 48 u - 7 u
= 41 u
41 u = 82
1 u = 82 ÷ 41 = 2
Total number of markers sold
= 77 u
= 77 x 2
= 154
Answer(s): 154
