So- my mom passed away a while ago and my dad left me and my brother at a orphanage. Okay- ; ^ ;

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

How do i do this activity, is appreciated

What is the lcm of 16 and 40 ? 24 and 40 ?