Five bells begin to toll together and toll at intervals of 4, 6, 7, 8 and 12 seconds, respectively. After how many seconds, will they toll together again?
1
172
2
170
3
166
4
168
Five bells begin to toll together and toll at intervals of 4, 6, 7, 8 and 12 seconds, respectively. After how many seconds, will they toll together again?
172
170
166
168