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Practice Questions for Number Systems Part-3 Video Lecture | Additional Study Material for UPSC

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FAQs on Practice Questions for Number Systems Part-3 Video Lecture - Additional Study Material for UPSC

1. What are the different number systems used in mathematics?
Ans. In mathematics, there are several different number systems used, including the decimal system (base-10), binary system (base-2), octal system (base-8), and hexadecimal system (base-16). Each number system has its own set of digits and rules for representing and manipulating numbers.
2. How do you convert a decimal number to a binary number?
Ans. To convert a decimal number to a binary number, you can use the process of successive division by 2. Start by dividing the decimal number by 2 and recording the remainder. Then, divide the quotient obtained by 2 again and record the remainder. Continue this process until the quotient becomes 0. The binary number is obtained by writing the remainders in reverse order.
3. What is the significance of the base in number systems?
Ans. The base of a number system determines the number of unique digits used in that system and the value assigned to each digit. For example, in the decimal system (base-10), there are 10 unique digits (0-9) and each digit represents a multiple of powers of 10. The base also affects the positional value of digits. Higher bases, such as binary (base-2) or hexadecimal (base-16), require more digits to represent numbers compared to lower bases like decimal.
4. How do you convert a binary number to a decimal number?
Ans. To convert a binary number to a decimal number, multiply each digit of the binary number by the corresponding power of 2 and sum up the results. Start from the rightmost digit of the binary number, with the power of 2 starting from 0 and increasing by 1 for each subsequent digit.
5. What is the octal system and how is it used in computing?
Ans. The octal system is a number system with a base of 8, meaning it uses 8 unique digits (0-7). In computing, octal numbers are used to represent groups of three binary digits, as each octal digit can be mapped to a sequence of three binary digits. This makes it easier to represent and manipulate binary numbers in a more compact form. Octal numbers are commonly used in computer programming and hardware design.

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