Digit : A digit is a symbol used in the representation of a number.

Divisible by 5 : An integer $x$ is called divisible by 5 if $x$ is a multiple of 5. An integer is divisible by 5 if and only if it ends in a 0 or a 5.

Multiple : A multiple of a number $x$ is any of the numbers $1x,2x,3x,4x,\ldots.$ For example the multiples of 7 include 7, 14, 21 and 70.

Number : A number $x$ is a mathematical symbol representing a quantity.

Count : To count means to find out the number of objects by adding one for every object.

Digit : A digit is a symbol used in the representation of a number.

Number : A number $x$ is a mathematical symbol representing a quantity.

Angle : If two line segments (or rays) both start at a common point the opening between the two line segments is called an angle. The common point is called vertex of the angle. The size of an angle is measured in degrees.

Degree : For angles one degree is defined as the angle represented by a $\frac{1}{360}$ of the angle represented by a full circle. For measuring temperatures one can use either degrees Celsius or degrees Fahrenheit. In a polynomial the degree describes the highest exponent of $x$ that has a non-zero coefficient. For example the degree of $1+x+x^2$ is 2.

Half : A Half is the number equal to $\frac{1}{2}=0.5.$

Hour : A unit for measuring time equal to 60 minutes.

Minute : A minute is a unit for measuring time equal to $\frac{1}{60}$ of an hour or 60 seconds.