What id the relationship between 0.04 and.004

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

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)