I have around 30 spreadsheets with a series of values including those
shown below. I need to remove all rows with the 5 minute entries and
keep those with the 10 minute entries.

From this:
30/09/2018 07:15 23959.093 0
30/09/2018 07:20 23959.093 0
30/09/2018 07:25 23959.093 0
30/09/2018 07:30 23959.093 0
30/09/2018 07:35 23959.094 0.012
30/09/2018 07:40 23959.099 0.06
30/09/2018 07:45 23959.108 0.108
30/09/2018 07:50 23959.118 0.12
30/09/2018 07:55 23959.123 0.06
30/09/2018 08:00 23959.127 0.048
30/09/2018 08:05 23959.132 0.06
30/09/2018 08:10 23959.138 0.072
30/09/2018 08:15 23959.145 0.084
30/09/2018 08:20 23959.153 0.096
30/09/2018 08:25 23959.162 0.108
30/09/2018 08:30 23959.173 0.132
30/09/2018 08:35 23959.185 0.144
30/09/2018 08:40 23959.199 0.168
30/09/2018 08:45 23959.215 0.192
30/09/2018 08:50 23959.234 0.228
30/09/2018 08:55 23959.256 0.264
30/09/2018 09:00 23959.28 0.288
30/09/2018 09:05 23959.306 0.312
30/09/2018 09:10 23959.336 0.36
30/09/2018 09:15 23959.366 0.36
30/09/2018 09:20 23959.4 0.408
30/09/2018 09:25 23959.434 0.408

To this:
30/09/2018 07:20 23959.093 0
30/09/2018 07:30 23959.093 0
30/09/2018 07:40 23959.099 0.06
30/09/2018 07:50 23959.118 0.12
30/09/2018 08:00 23959.127 0.048
30/09/2018 08:10 23959.138 0.072
30/09/2018 08:20 23959.153 0.096
30/09/2018 08:30 23959.173 0.132
30/09/2018 08:40 23959.199 0.168
30/09/2018 08:50 23959.234 0.228
30/09/2018 09:00 23959.28 0.288
30/09/2018 09:10 23959.336 0.36
30/09/2018 09:20 23959.4 0.408



Any help would be appreciated!


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