Riddle #1: Your job is to decode numbers. You are told that 249= 51 and that 636 is also equals 51, the number 837 = 81. What is 986 equal two
under this coding system?

Please help

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?