People's Park is the starting point of No.3 bus and No.5 bus. No.3 bus leaves every 6 minutes and No.5 bus leaves every 8 minutes. These two buses leave at the same time In the future, at least how many minutes will it leave at the same time?

People's Park is the starting point of No.3 bus and No.5 bus. No.3 bus leaves every 6 minutes and No.5 bus leaves every 8 minutes. These two buses leave at the same time In the future, at least how many minutes will it leave at the same time?

At least 48 minutes later

Children's Park is the starting point of No.2 and No.6 buses. No.2 bus leaves every five minutes, and No.6 bus leaves every three minutes. After the two buses leave at the same time at 8 a.m., how many minutes will they leave at the same time!

3x5 = 15 minutes

The railway station is the starting point of No.1 bus and No.3 bus. No.1 bus leaves every 5 minutes and No.3 bus leaves every 8 minutes
At least how many minutes can we start at the same time

This is the least common multiple. 5x8 = 40 (minutes). After the two buses start at the same time, they can start at the same time at least 40 minutes later

Bus No.1 starts every 3 minutes and bus No.3 starts every 5 minutes. These two buses start at the same time, at least once more______ The train leaves at the same time

Because 3 and 5 are coprime numbers, the least common multiple of 3 and 5 is: 3 × 5 = 15; a: at least 15 minutes later, the train will start at the same time; so the answer is: 15