Just calculate it exactly as written. Don’t make any assumptions (like including a bus driver, legless girls or cats, pregnant cats etc.) In this bus, the girls get on the bus the same as they normally would (they won’t be on the roof!) The correct solution to this math problem is the password to open this Cats & Backpacks Excel file  Enter password as a numeric number with no comma(s)  If you can open it, add your name to the list and pass it on to others to “scratch on”! Math Problem There are 7 girls on a bus. Each girl has 7 backpacks. In each backpack there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus? (the number of legs is the password to unlock the Excel file) Can't work it out? Send us an email and we'll send you the answer... see also Puzzle Section Birding Skills 101 Can You Find the Hidden Bird? Can You See It? Can You Spot the Hidden Junkyard Cat? Cats and Backpacks Describe Yourself Do You See A Bird or a Girl? Find The Dogs Find The Hidden Animals Fox Hunt  Head Hunter du Jour Frogs Switch Irish Exam Kettle Valley Railroad Maiden Rock Illusion Math Puzzle Math Riddle Spot The Clock Spot The Hidden Cell Tower Spot The KMart Shopper Spot The Mistake Spot The Man’s Head Spot The Thief Stealth Cat suDoku at suJoku Which One’s Real? 
