When is estimation is an effective way to determine an answer

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.

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

Which expression shows the sum of the polynomials with like terms grouped together