Below is an abacus consisting of five sufficiently long rods. On the abacus; 1 bead is placed on the 1st rod, 2 beads on the 2nd rod, and similarly, as many beads as its number are placed on the other rods. Thus the first round is completed as shown in the figure. Then we start over and 6 beads are placed on the 1st rod, 7 beads on the 2nd rod, and similarly, one more bead than was placed on the previous rod is placed on the other rods. After each round, the number of beads on the 5th rod plus one is placed on the 1st rod, and the rounds continue. Accordingly, on which rod will the 220th bead to be placed be located? A) I. B) II. C) III. D) IV. E) V.
Below is an abacus consisting of five sufficiently long rods. On the abacus; 1 bead is placed on the 1st rod, 2 beads on the 2nd rod, and similarly, as many beads as its number are placed on the other rods. Thus the first round is completed as shown in the figure.
Then we start over and 6 beads are placed on the 1st rod, 7 beads on the 2nd rod, and similarly, one more bead than was placed on the previous rod is placed on the other rods. After each round, the number of beads on the 5th rod plus one is placed on the 1st rod, and the rounds continue.
Accordingly, on which rod will the 220th bead to be placed be located?\\
A) I.\\
B) II.\\
C) III.\\
D) IV.\\
E) V.