BASIC COMPUTER CONCEPTS
HISTORY OF COMPUTERS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Each row represents a unit ten greater than the previous.
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Each row represents a unit of ten
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Each row represents a unit ten greater than the next.
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None of the above
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Detailed explanation-1: -Generally, each row or column in an abacus represents a place value such as the ones place, tens place, hundreds place, and so on. Using the first abacus with beads of a single color in each row, the black beads can be used to represent the ones place.
Detailed explanation-2: -The spikes from right to left represent the places of the place values of the digits in increasing order i.e., 1, 10, 100, ………. etc. These places are denoted by O (unit or ones), T (tens), H (hundreds), Th (thousands), T th (ten thousands), H th (hundred thousands) and so on ……… .
Detailed explanation-3: -Each vertical column of beads represents a digit. The column on the far right represents ones, second from the right is tens, third from the right is hundreds, fourth from the right is thousands, and so on.
Detailed explanation-4: -There are two beads on each rod in the upper deck and five beads each in the bottom one.