Refer to

https://www.beatthegmat.com/difficult-ma ... -t795.html

Jow can you find that in the forum? I tried but I didn't find it. Thks

Here u go

0 1 2 3 4 5

x x x
5 5 4 = 100

100 place digit can be selected in 5 ways [12345]
10 place digit can be selected in 5 ways 0-6 except one used just before
unit place digit can be selected in 4 ways 0-6 except one used at 10 and 100 place

total = 5 5 4 = 100


Odd
unit place 3 [135]
100 place in 4 ways [12345 - 1 digit used just before]
10 place digit in 4 ways

total = 3 4 4 = 48


even = 100 - 52

You should be able to click directly on the link or copy/paste it on the browser

i have a doubt:

i worked the question similar way, got 100 total 3 digit numbers, i worked out the number of even numbers first, i got 48 (4*4*3) and the balance 52 gave me the number of odd numbers. did i go wrong somehere?