Posted by **AD** on Wednesday, March 16, 2011 at 8:58pm.

One chicken lays an egg every 2 days, another every 3 days and a third chicken lays an egg every 5 days. They all lay an egg today. How many days in the next 101 days will EXACTLY 2 chickens be laying an egg?

- arithmetic -
**Writeacher**, Wednesday, March 16, 2011 at 10:00pm
It sounds as if you need to find a good calendar with big blocks and three pens of different colors.

Dive in...

- arithmetic -
**Bethany**, Sunday, November 4, 2012 at 5:34pm
First, you have to find the least common multiple of the number of days between eggs (2,3,4) to get 30. Then, you make a list of numbers 1-30:

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

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