Arlenetalento9go Arlenetalento9go Math Answered Activity 3. Looking for Common? write whether each sequence is arithmetic or geometric sequence. if arithmetic find the common difference and if geometric find the common ratio. EXAMPLE: 4, 8, 16, 32, ... Geometric: r = 2 1. 6, 26, 36, 46,... 2. 2, 12, 72, 432,... 3. 3, 15, 75, 375,... 4. 243, 81, 27, 9, 3,... 5. - 39,- 47,-55, -63, ...