Answer all the questions below and press submit to see how many you got right.
Number : A number $x$ is a mathematical symbol representing a quantity.
Which of the numbers between 1 and 10 is missing in 1, 2, 3, 4, 5, 6, 7, 8, 9
Count : To count means to find out the number of objects by adding one for every object.
Matrix : A $m\times n$ matrix is a rectangular arrangement of $m\cdot n$ numbers into $m$ rows and $n$ columns. For example $\begin{pmatrix}1&2&3\\4&5&6\\\end{pmatrix}$ is a $3\times 2$ matrix. $A_{ij}$ refers to the element of $A$ in the i-th row and j-th column.
How many numbers are in $\begin{matrix}1&2\\3&4\\5&6\\7\end{matrix}?$
What is the number directly before 2?