Topic Details (Notes format)

How to Convert Between Different Number Bases

Subject: Mathematics

Book: Maths Mastery

Number systems like binary (base 2), octal (base 8), and hexadecimal (base 16) appear in computing, while decimal is base 10. To convert a decimal integer to binary, repeatedly divide by 2, gathering remainders. For example, 13 in binary is 1101. Reversely, sum place values 1×2³+1×2²+0×2¹+1×2⁰=8+4+0+1=13. Conversions among bases are vital in digital electronics, programming (memory addresses), or cryptographic systems. Mastering them fosters agility with computational tasks and fosters deeper understanding of how digital systems store and process numbers.

Practice Questions

A train 150 m long passes a pole in 15 seconds. What is its speed?

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The sides of a triangle are 13 cm, 14 cm, and 15 cm. What is its area?

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What is the area of a sector of a circle with radius 14 cm and central angle 90°?

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The simple interest on Rs. 4000 at 5% per annum for 2 years is:

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A cone has a base radius of 7 cm and height of 24 cm. What is its volume?

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If the average of five consecutive odd numbers is 25, what is the largest number?

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What is the area of an equilateral triangle with side length 10 cm?

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What is the value of x if log(x) + log(4) = log(32)?

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If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

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A train 120 meters long is moving at a speed of 54 km/h. How long will it take to pass a pole?

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