Indira, bonnie and chang all work at the same pet store. indira works every other day. bonnie works every fourth day. chang works every fifth day. today they all work together. how many days will it be until the work together again?

To find the next day the three will work together, look for the least common multiple of 2,4,5. Multiples of 5 are (5,10,15,20,25), while 4 has multiples of (4,8,12,16,20), and 2 has all even multiples. The least number that is found in all three sets would be 20, so the three employees will work together again in 20 days.