A Story of Numbers

In the rational number $\frac{a}{b}$, if $a = 0$ and $b = 5$, the value is:

What is the additive inverse of $-1$?

Which of the following is equivalent to $\frac{2}{5}$?

The product of two rational numbers is $\frac{-4}{9}$. If one number is $\frac{2}{3}$, what is the other?

Reema is exploring rational numbers in her notebook. She draws a rectangle with an area of $\frac{11}{3} \text{ cm}^2$ and a length of $\frac{11}{2} \text{ cm}$. What is the perimeter of the rectangle she drew?

What is the absolute value of $\frac{-7}{9}$?

Which of the following is equivalent to $\frac{4}{5}$?

In the cryptarithm $ON + ON + ON = GO$, what is the digit representing $O$?

If a number $N$ leaves a remainder of 2 when divided by 3, what remainder does $N^2$ leave when divided by 3?

If $A, B$ are digits and $AB + BA = 121$, find the value of $A + B$.

Which number is called the additive identity for integers?

What is the sum of the first three natural numbers?

Which of these numbers is an integer but not a whole number?

What is the Roman numeral for $500$?

Convert the decimal number $14$ to its Roman numeral equivalent.

In the Babylonian system, the number $61$ would be represented as:

Which of these symbols was used for $10^0$ (the number $1$) in the Egyptian system?

A positional system with base $b$ requires how many unique digits (including zero)?

Identify the base used by the ancient Sumerians/Babylonians for their positional system.

In Roman numerals, what is the value of $DCLXVI$?

In the base 10 system, the number $0$ acts as a:

If $a$ is the tens digit and $b$ is the units digit, then $10a + b$ is a:

What is the generalized form of $123$?

Which power of 10 represents the 'thousands' place?

If $x + y + z$ is a multiple of 3, then the number $xyz$ is always divisible by:

How many bits (binary digits) are needed to represent the decimal number 7?

If $A1 + 1B = B0$, and $A$ and $B$ are digits, find $A$.

In which base $n$ is the statement $2 \times 2 = 10$ correct?

If $A, B, C$ are consecutive digits such that $B = A + 1$ and $C = B + 1$, find the value of $(BCA - ABC) / 9$.

Convert the binary number $(1101)_2$ to base $4$.