One of the oldest devices used for calculation is the abacus, as shown in the sample figure. Each rod names one of the positions we use in counting. Each bead on the bottom represents one unit in that column and each bead on the top represents 5 units in that column. The number illustrated in the sample figure below is 1,734.
Sample
Choose an abacus to show 10,905.

A B

C D
A) C
B) B
C) D
D) A
E) none of these

Question

One of the oldest devices used for calculation is the abacus, as shown in the sample figure. Each rod names one of the positions we use in counting. Each bead on the bottom represents one unit in that column and each bead on the top represents 5 units in that column. The number illustrated in the sample figure below is 1,734. ​
Sample  ​
Choose an abacus to show 10,905.
​
A  B  ​
​
C  D  ​
A) C 
B) B 
C) D 
D) A 
E) none of these

Quizplus · Accepted Answer

The Answer of One of the oldest devices used for calculation is the abacus, as shown in the sample figure. Each rod names one of the positions we use in counting. Each bead on the bottom represents one unit in that column and each bead on the top represents 5 units in that column. The number illustrated in the sample figure below is 1,734. ​
Sample  ​
Choose an abacus to show 10,905.
​
A  B  ​
​
C  D  ​
A) C 
B) B 
C) D 
D) A 
E) none of these

One of the Oldest Devices Used for Calculation Is the Abacus