A Story of Numbers | FIO

Question 22

Where in your daily lives, and in which professions, do the Hindu numerals, and 0, play an important role? How might our lives have been different if our number system and 0 hadn't been invented or conceived of?

Solution

Understand the Question

The Hindu-Arabic numeral system (using digits $0$ to $9$ ) and the concept of zero ( $0$ ) provide a place-value system that makes reading, writing, and calculating numbers simple and universal.
To answer this question, we identify where numbers are used in daily life, examine key professions that rely on them, and analyze how the absence of place value and zero would impact science, arithmetic, and modern digital technology.

Step 1 · Role in Daily Life

Hindu numerals and zero play an essential role in daily activities:

Time and Dates: Reading clocks, setting alarms, and using calendars.
Commerce and Money: Pricing items, shopping, counting currency, and calculating change.
Identification and Tracking: Phone numbers, house numbers, vehicle registration plates, and PIN codes.
Measurements: Measuring ingredients for cooking, tracking travel distances, body weight, and temperatures.

Step 2 · Role in Professions

Modern professions depend entirely on an efficient number system:

Accountants and Bankers: Managing financial records, computing interest, balancing ledgers, and transactions.
Engineers and Architects: Calculating dimensions, loads, and designing blueprints.
Doctors and Pharmacists: Measuring precise drug dosages and monitoring vital signs.
Scientists: Collecting experimental data, performing complex calculations, and formulating laws.
Software Developers: Writing code, creating algorithms, and manipulating data.

Step 3 · Life Without Hindu Numerals and Zero

If our numeral system and zero had not been conceived:

Cumbersome Calculations: Ancient non-place-value systems (like Roman numerals, e.g., $\text{CXLVII} + \text{LXIX}$ ) made simple arithmetic extremely tedious and complex.
Loss of Place Value: Without $0$ acting as a placeholder, distinguishing numbers like $1$ , $10$ , and $100$ would be ambiguous and confusing.
No Digital Technology: Computers operate on binary code using bits of $0$ s and $1$ s. Without the concept of zero, modern computing, software, and the internet would not exist.
Halted Scientific Advancement: Modern algebra, calculus, physics, and aerospace engineering could not have evolved without an efficient positional number system.

Answer

Hindu numerals and zero are vital for daily tasks (telling time, trade, measurements) and across professions (engineering, medicine, finance, computing). Without them and the place-value system, arithmetic would be extremely cumbersome, modern science would be stunted, and digital computers (which rely on binary $0$ and $1$ ) could not exist.

Common Mistakes

Underestimating Zero as a Placeholder: Thinking zero only represents "nothing" rather than recognizing its critical role in place value (distinguishing $1$ , $10$ , and $100$ ).
Overlooking Digital Systems: Forgetting that all modern computing and telecommunications depend fundamentally on the binary system of $0$ s and $1$ s.

More questions in FIO

Suppose you are using the number system that uses sticks to represent numbers, as in Method 1. Without using either the number names or the numerals of the Hindu number system, give a method for adding, subtracting, multiplying and dividing two numbers or two collections of sticks.

One way of extending the number system in Method 2 is by using strings with more than one letter—for example, we could use 'aa' for 27. How can you extend this system to represent all the numbers? There are many ways of doing it!

Try making your own number system.

Represent the following numbers in the Roman system.

(i) 1222 (ii) 2999 (iii) 302 (iv) 715

A group of indigenous people in a Pacific island use different sequences of number names to count different objects. Why do you think they do this?

Consider the extension of the Gumulgal number system beyond 6 in the same way of counting by 2s. Come up with ways of performing the different arithmetic operations $(+, -, \times, \div)$ for numbers occurring in this system, without using Hindu numerals. Use this to evaluate the following:

(i) $(\text{ukasar-ukasar-ukasar-ukasar-urapon}) + (\text{ukasar-ukasar-ukasar-urapon})$

(ii) $(\text{ukasar-ukasar-ukasar-ukasar-urapon}) - (\text{ukasar-ukasar-ukasar-ukasar})$

(iii) $(\text{ukasar-ukasar-ukasar-ukasar-urapon}) \times (\text{ukasar-ukasar})$

(iv) $(\text{ukasar-ukasar-ukasar-ukasar-ukasar-ukasar-ukasar-ukasar}) \div (\text{ukasar-ukasar})$

Identify the features of the Hindu number system that make it efficient when compared to the Roman number system.

Using the ideas discussed in this section, try refining the number system you might have made earlier.

Represent the following numbers in the Egyptian system: 10458, 1023, 2660, 784, 1111, 70707.

Q10

What numbers do these numerals stand for?

Q11

Write the following numbers in the above base-5 system using the symbols in Table 2: 15, 50, 137, 293, 651.

Q12

Is there a number that cannot be represented in our base-5 system above? Why or why not?

Q13

Compute the landmark numbers of a base-7 system. In general, what are the landmark numbers of a base- $n$ system?

Q14

Add the following Egyptian numerals:

Q15

Add the following numerals that are in the base-5 system that we created:

Remember that in this system, 5 times a landmark number gives the next one!

Q16

Can there be a number whose representation in Egyptian numerals has one of the symbols occurring 10 or more times? Why not?

Q17

Create your own number system of base 4, and represent numbers from 1 to 16.

Q18

Give a simple rule to multiply a given number by 5 in the base-5 system that we created.

Q19

Represent the following numbers in the Mesopotamian system —

(i) 63 (ii) 132 (iii) 200 (iv) 60 (v) 3605

Q20

Why do you think the Chinese alternated between the Zong and Heng symbols? If only the Zong symbols were to be used, how would 41 be represented? Could this numeral be interpreted in any other way if there is no significant space between two successive positions?

Q21

Form a base-2 place value system using 'ukasar' and 'urapon' as the digits. Compare this system with that of the Gumulgal's.

Q22

Q23

The ancient Indians likely used base 10 for the Hindu number system because humans have 10 fingers, and so we can use our fingers to count. But what if we had only 8 fingers? How would we be writing numbers then? What would the Hindu numerals look like if we were using base 8 instead? Base 5? Try writing the base-10 Hindu numeral 25 as base-8 and base-5 Hindu numerals, respectively. Can you write it in base-2?