Question

counting question

Answer 1

How many 3 digit numbers can be generated from 1,2,3,4,5,6,7,8,9
such that the digits are in ascending order?

Answer 2

sorry I can't think about this

Answer 3

@Nnesha @Jhannybean

Answer 4

@zepdrix

Answer 5

So I guess the first few numbers are
123
124
125
and so on?

Answer 6

yes also these can happen 789,689

Answer 7

Numbers beginning with
12 - 7 numbers
13 - 6 numbers
14 - 5 numbers
15 - 4 numbers
16 - 3 numbers
17 - 2 numbers
18 - 1 number

Answer 8

Numbers beginning with 1 28

Answer 9

Numbers beginning with
23 - 6 numbers
24 - 5
26 - 4
27 - 3
28 - 2
29 - 1
Total numbers 21

Answer 10

Numbers beginning with 3 =
5 + 4 + 3 + 2 + 1
= 15

Answer 11

Numbers beginning 4 =
4 + 3 + 2 + 1
= 10

Answer 12

is it 28+21+15+10+6+3+1 reverse triangular numbers

Answer 13

I'd say that's it :-)

Answer 14

lol it is correct 84 thnks

Answer 15

All right and u r welcome