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Chapter 3 Class 8 - A Story of Numbers (Ganita Prakash) | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 480
Question 1 of 5
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Question 1 of 5

Which sequence gives the first five landmark numbers of a base-7 system?

Select one option. Answers are shown after the test.
Question 2 of 5

A system represents a quantity only by repeating a symbol worth 5. How many such symbols are needed to represent 1345?

Select one option. Answers are shown after the test.
Question 3 of 5

Assertion:

On the decimal abacus described in the chapter, combining 2907 and 43 gives 2950.


Reason:

The 7 ones and 3 ones are exchanged for one ten, after which the tens place contains five tens.

Select one option. Answers are shown after the test.
Question 4 of 5
Exact Egyptian landmark symbols from the textbook

Assertion:

Using the Egyptian symbols above, seven \(10^4\)-symbols, seven \(10^2\)-symbols and seven unit symbols represent 70707.


Reason:

After complete regrouping in the Egyptian system, no landmark symbol needs to occur 10 or more times.

Select one option. Answers are shown after the test.
Question 5 of 5

Assertion:

In an extension of the Gumulgal system, ukasar-ukasar-urapon plus ukasar gives ukasar-ukasar-ukasar-urapon.


Reason:

Historically, the Gumulgal used the word ras for numbers greater than 6.

Select one option. Answers are shown after the test.