Question

How many no can be formed using digits (1,2,3,4,5,6,7,8,9)..such that they are in increasing order(eg:0 12345,345,6789,123456789)???

Answer 1

infinity numbers can be formed
.....

Answer 2

All possible answers are,

12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789,

23, 234, 2345, 23456, 234567, 2345678, 23456789,

34, 345, 3456, 34567, 345678, 3456789,

45, 456, 4567, 45678, 456789,

56, 567, 5678, 56789,

67, 678, 6789,

78, 789,

89.

So the answer is: 37 such number can be formed like this.

Hope it helped you!