8th Grade Number Representation Quizzes , Questions & Answers

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8th Grade

Top Trending Number Representation Quizzes

This Two's Complement Quiz helps you master how computers represent negative numbers in binary. You'll learn to convert between decimal and two's complement form, understand sign bits, and solve problems involving binary...

Questions: 15 | Attempts: 132 | Last updated: Apr 30, 2026

Sample Question 1
What is the two's complement of the 8-bit binary number 00101010?

11010110

11010101

10101010

11010100

Sample Question 2
In an 8-bit two's complement system, what is the leftmost bit called?

Parity bit

Sign bit

Magnitude bit

Control bit

Floating Point Representation Quiz

This Floating Point Representation Quiz helps students understand how computers store and work with decimal numbers. You'll explore scientific notation, mantissa and exponent concepts, and how floating point numbers differ from...

Questions: 16 | Attempts: 12 | Last updated: Apr 30, 2026

Sample Question 1
What is the primary reason computers use floating point representation instead of just integers?

To store very large and very small decimal numbers efficiently

Because it uses less memory than integers

To make calculations faster

Because integers cannot be stored in computers

Sample Question 2
In scientific notation, the number 0.00456 is written as 4.56 × 10⁻³. What is the exponent called in floating point terms?

Mantissa

Significand

Exponent

Base

8th Grade Number Representation Quizzes , Questions & Answers

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