SOLUTION: john calls his dad every 3 days. Katie calls every 4 days. Jamie calls every 6 days. once in every _______ days, all three will call on the same day.

Question 939260: john calls his dad every 3 days.
Katie calls every 4 days.
Jamie calls every 6 days.
once in every _______ days, all three will call on the same day.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
List the prime factor form of the numbers::
john calls his dad every 3 days. = 3
Katie calls every 4 days.= 2^2
Jamie calls every 6 days. = 2*3
------
The least common multiple is 2^2*3 = 12
---
Ans:: once in every 12 days, all three will call on the same day.
============
Cheers,
Stan H.
--------------
RELATED QUESTIONS
Please help me solve this equation: anita and fran have volunteered to contact every... (answered by vleith)

If Amy mow her lawn every 8 days and Tom mow his lawn every 4 days How many days will... (answered by Alan3354)

Brad, Chaz, Dean and Evie go swimming at the same pool. Brad goes every 3 days. Chaz... (answered by math_helper)

Trevor jogs once every 3 days and swims once every 4 days. How often does he jog and swim (answered by stanbon)

it is Monday, and Harry,Sammy and Dave are all playing together in the park. if harry... (answered by ankor@dixie-net.com)

Molly and Polly practice at the same gym. Molly goes every three days and Polly goes... (answered by solver91311)

Ashley rides her bike every 8 days. Sam rides her bike every 12 days, and James rides his (answered by ankor@dixie-net.com,flame8855)

Jim visits the barber every 9 days. Ralph visits the barber every 24 days. Pete visits... (answered by richwmiller)

three travelers meet whenever they are all in los angeles at the same time. One traveler... (answered by ankor@dixie-net.com)