You have diving lessons every fifth day and swimming lessons every third day. today you have both lessons. in how many days will you have both lessons on the same day again?

answer: a.   one is a factor of every whole number since every number is divisible by itself.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540