Whats the mode of 31 29 33 37 43 38 33 40

Can you me find the missing length. i attached an image.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.