2x
Twice a number / Two times a number
6 + x
5
1, 5
2 + x = ?
x = 15
17
A letter that represents any number
What is a variable?
n + 7
A number plus seven / a number and seven
triple a number minus five
3n - 5
6
1, 2, 3, 6
3x + 21 = ?
x = 3
30
A mathematical sentence (number sentence) that says two things are EQUAL
What is an equation?
The quotient of a number and 2 minus 5 / half a number minus 5
Half a number and seven
n/2 + 7
20
1, 2, 4, 5, 10, 20
100 - 100/n = ?
n = 5
80
The largest number that divides 2 or more numbers evenly
What is Greatest Common Factor?
3x - 4
(Say it in turn around)
Four less than three times a number
Sixteen less than triple a number
3x - 16
24
1, 2, 3, 4, 6, 8, 12, 24
2n + 3n + 4n = ?
n = 2
18
A whole number greater than 1 that has more than 1 factor pair
What is a Composite number?
(4 + n) - 2/7
(Say it in turn around)
The quotient of 2 and 7 less than the sum of 4 and a number
The sum of a number and 4 substracted from the days in a year
365 - (n + 4)
60
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
100/x - 2x + (6 - x) = ?
x = 5
11
A whole number greater than 1 witn only one factor pair.
What is a prime number?