How many 9s between 1 and 100 riddle?
Answer: We have to find the number of 9 in 1 to 100
If only natural numbers are considered while counting, then 9 appears 20 times.
The natural numbers from 1 to 100 are:
1, 2, 3, 4, 5, ……………………., 99, 100
Counting number of 9 in 1 to 100
9, 19, 29, 39, 49, 59, 69, 79, 89, 99 (10 times in unit digit) and
90, 91, 92, 93, 94, 95, 96, 97, 98, 99 (10 times ten’s digit)
So there total of 20 nine’s in 1 to 100
When we consider all possible numbers ( real numbers) then,
All possible numbers (Real numbers):
There will be 20 of the earlier ones plus there will be decimals like 5.889, 7.49, and many more. So there will be an INFINITE number of 9s in between 1 to 100