Subject :IMO Class : Class 3
Mary and her friends put their marbles into groups of ten. Mary had 6 groups, Sandy
had 5 groups and Jack had 9 groups. There were 4 marbles left over. How many marbles did the three friends have altogether ?
A120
B822
C204
D214
Ans 1: (Master Answer)
Class : Class 1
(C): Number of marbles in each group = 10
Total number of groups altogether had = 6 + 5 + 9 = 20
Total number of marbles = 20 x 10 + 4 = 204