Number patterns
2,4,6,8,__
10
x + 6 when x = 24
30
x + x + x
3x
2x = 20
x = ?
x = 10
The total age of Arnold, Bernard and Cindy is 10w years. Arnold is 2w years old. Bernard is the same age as Cindy. If w = 4, how old is Cindy?
16 years old
100, 75, 50, __
25
2x when x = 12
24
c + c + c + c + c + c
6c
5x = 65
x = ?
x = 13
80, 40, 20, 10, __
5
2x - 5 when x = 3
1
4r + 2r
6r
4x +7 = 35
x = ?
x = 7
1, 3, 7, 13, 21, __
31
5x + 30 when x = 11
85
3t + t - 2t + 8t
10t
12x - 39 = 105
x = ?
x = 12
5, 20, 80, 320, __
1280
5x + 12 + 3x + 13 when x = 5
65
7x + 4x - 10x + 9x - 5x
5x
5x +289 = 514
x = ?
x = 45