看看这个小学数学题， 你的答案是几？

Beestar的免费数学训练题

Mr. Broyles is planning a 5-minute segment of the city's fireworks show. He decides that the red fireworks should go off every 10 seconds and the white fireworks should go off every 15 seconds. The 5 minute (300 seconds) segment begins with red and white fireworks going off at the same time. How many times during the 5 minute segment will the red and white fireworks go off at the same time?

所有跟帖： 

• they go off at the same time at 0, 30, 60, 90, 120, 150, 180, 2 -林吉- ♂ (176 bytes) () 01/22/2016 postreply 07:42:24

• 如果严格按照5min 焰火时间不应该算，算还是不算和数学无关取决于题目本意 -yddad- ♂ (0 bytes) () 01/22/2016 postreply 08:05:32

• 11次，我理解是INCLUSIVE. -WISEBAO- ♀ (0 bytes) () 01/22/2016 postreply 07:51:42

• 10 次得A，11次A+ -TZX999- ♂ (0 bytes) () 01/22/2016 postreply 08:16:10

• 小孩认为10， 第300不包括。 但beestar给答案是11， Inclusive. 是因为题里有300，还是 -林吉- ♂ (80 bytes) () 01/22/2016 postreply 11:17:55

• 这得看习惯，亚洲一般不包括，欧美一般是INCLUSIVE，是Beestar的题吗？ -高船长- ♂ (38 bytes) () 01/22/2016 postreply 11:22:25

• 是的！谢谢your help! -林吉- ♂ (0 bytes) () 01/30/2016 postreply 15:44:31