Count Numbers..............
Level
pending
How many 4 digit numbers are there which contains only odd numbers. e.g. 1357 (written with odd numbers)
980
1000
120
625
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
The number of odd numbers from 1 to 10 = 5 (ie. 1, 3, 5, 7, 9)
One of the five numbers is each place.
So the number of possible numbers is = 5 × 5 × 5 × 5 = 6 2 5