144
65/65=1+65=66
66 times 6 equals 396.
66 plus 66 equals 132
18 + 10 + 28 + 10 = 66
x = 10
96
26
144
144
1+2+3+... +65 = 65*66/2 = 65*33 = 2145 For the required sum, each term is simply double the corresponding term above, so 2+4+6+... + 130 = 2*2145 = 4290
66
If I am correct, 9 plus 7 equals 112.