Question

how many three digit numbers divisible by 6 the number are in consecutive and without repetition of digit (i. e. 876, 687) not (102) means zero not allowed asked in pune 11/6/2016

Answer 1

123 give 2 i.e 132 and 312

234 give 4 234 324 342 432

345 give 2 and so on

456 give 4

567 give 2 

678 give 4

and 789 give 2

total 20