this is complicated help please, i really need help =]?

Question

A bell rings every 30 min., a second bell rings every 40 minutes, and a third bell rings every 60 minutes. If all three bells ring at noon, what time will all three bells ring together again??

Answer 1

30 min bell

12:30 1:00 1:30 2:00

40 min bell
12:40 1:20 2:00

60 min bell
12:00 1:00 2:00

Answer 2:00

Answer 2

Tip for word problems:

Write it out with graph, table, picture, etc.

The only way to figure these out is to sort of draw it.
1st bell= 12 noon, 12:30. 1:00, 1:30, 2:00, 2:30, 3:00, etc.
2nd bell= 12 noon, 1:00, 2:00, 3:00, 4:00, etc.
3rd bell= 12 noon, 12:40, 1:20, 2:00, 2:40, 3:20, 4:00, etc.
So the next time they'd ring together would be 2 PM.

Answer 3

this is pretty easy if you know all of the common multiples of 34and6 and can divide them by 6. because they ring at noon, the problem is pretty easy, because noon is like 0. then all you have to do is find the lowest common multiple. 30 and 60 are easy, b/c the 30 rings every time the 60 does, so all you have to do is find out when the 60 and 40 ring together. the lowest common multiple of these 2 numbers is 120. divide it by 60 and you get 2. so the answer is 2 o'clock. im pretty sure

Answer 4

make a table
or a graph

u already know that every time the 60 min bell ring so does the 30 min one
it might be @ 180 minutes
if your answer is like that convert it to hours & add it to 12

Answer 5

start at 12
1st bell: 12:30
2nd bell: 12: 40
3rd bell: 1:00
1st: 1:00
2nd: 1:20
3rd: 2:00
1st: 1:30
2nd: 2:00
3rd: 4:00
1st: 2:oo
2nd: 2:40
3rd: 5:00
1st: 2:30
2nd 3:20
3rd 6:00
1st 3:00
2nd 4:00
3rd 7:oo
1st 3:30
2nd: 4:40
3rd: 8: 00
1st 4:00
2nd: 5 :2o
3rd: 9:00
1st 4:30
2nd 6:00
3rd: 10:00


i really dont know but i hope this helped

Answer 6

2:00

Answer 7

It would ring at 2 i think. hope this helps.

Answer 8

At two o'clock.

Answer 9

......at 2 pm.!