Problem 1 · 2011 Math Kangaroo
Easy
Arithmetic & Operations
off-by-one
Bernd wants to paint the word KANGAROO. He begins on a Wednesday and paints one letter each day. On which day will he paint the last letter?
Show answer
Answer: C — Wednesday
Show hints
Hint 1 of 2
How many letters are in KANGAROO? That is how many days he paints.
Still stuck? Show hint 2 →
Hint 2 of 2
The days of the week repeat every 7 days, so look at how 8 days compares to a full week.
Show solution
Approach: count letters and step the weekday forward
- KANGAROO has 8 letters, so painting takes 8 days, one per day.
- Day 1 is Wednesday; 7 days later is again Wednesday, and that is day 8.
- So the last letter is painted on a Wednesday.
Mark:
· log in to save