The ratio of boys to girls is 1:2. Two boys and two girls enter the
room and the ratio is now 5:9.
How many boys and girls were
there originally?

Which two undefined geometric terms always describe figures with no beginning or end?

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.