Numbers Quiz: Count Me In
7 questions on ancient counting, huge numbers and a few results stranger than they look.
- Questions
7 - Length
About 4 min
Spoiler: show the questions 7 questions
- Which number had no symbol in Roman numerals?
- On this abacus, why can the same move mean 1, 10 or 100?
- Our 60-minute hour goes back to the counting system of which ancient people?
- How many prime numbers are there from 1 to 100?
- Sort these spans of time, shortest first.
- How many people must be in a room for a better than even chance that two share a birthday?
- What is the name for 1 followed by 100 zeros?