Odd # LCM
11 and 33
33
1 1/2 + 3/4
10/4
On a track for remote-controlled racing cars, racing car A completes the track in 8 seconds, while racing car B completes it in 10 seconds. If they both start at the same time, after how many seconds will they be side by side again?
40
3 1/3
7/3
2 and 4
4
4 and 5
20
5/10 - 2/4
0
Matthew goes hiking every 12 days and swimming every 6 days. He did both kinds of exercise today. How many days from now will he go both hiking and swimming again?
12
4 2/4
18/4
4 and 8
8
5 and 9
45
2 3/5 - 2/4
42/20
Edeena is packing equal numbers of apple slices and grapes for snacks. Edeena bags the apple slices in groups of 18 and the grapes in groups of 9. What is the smallest number of grapes that she can pack?
18
5 1/2
11/2
10 and 12
60
3 and 5
15
3/7 + 2 7/10
219/70
Wilma is thinking of a number that is divisible by both 7 and 8. What is the smallest possible number that Wilma could be thinking of?
56
9 3/4
39/4
22 and 2
22
9 and 11
99
3/11 + 5 1/2
127/22
Jackson and Gwen are shelving books at a public library. Jackson shelves 11 books at a time, whereas Gwen shelves 5 at a time. If they end up shelving the same number of books, what is the smallest number of books each could have shelved?
55
10 7/9
97/9
80 and 100
400