On a particular day, a number of candidates arrived to take various examinations at a center. of these, half took the physics paper in the morning and 70 took Geography paper in the afternoon there were only 20 candidates who took both the physics and Geography paper Find how many of the candidates
(i) took the examination
(ii) took the physics paper but not the Geography ​

Multiplying an even number of negative numbers gives an answer that is choose from:

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?