Math Brain Teasers · Billy-B
Math Brain Teaser #18
From Billy-B's legendary 1001 Puzzle Collection — preserved on Puzz.com since 1998.
Puzzle #18
Andy, Bart, and Chris are eating at Smiley's All You Can Eat Pizza Buffet. Andy made 2.4 times as many trips to the buffet as Bart, and Bart made 6 fewer trips than Chris. What is the smallest possible total number of trips the 3 made to the buffet, assuming that each person made at least one trip?
Reveal Answer
There were 28 total trips made, with Andy making 12 of them, Bart making 5, and Chris making 11. The puzzle can be expressed algebraically as A + B + C = X, where X is the total number of trips — A = 2.4B. Because A has to be a whole number (Andy couldn't make 2.4 trips, for example), you quickly find that 12 and 5 are the lowest possible whole numbers for A and B, which makes C 11.
Love this puzzle?
Explore all 20 math brain teasers from Bill's collection in our math brain teasers — beautifully formatted with instant answer reveal.
See the Full Gallery →⭐ Featured · Bill's Pick
Stickels Brain Teasers
32 math and logic teasers — Terry Stickels's licensed puzzle library is another of Bill's favorites on Puzz.com.
Explore Stickels →