MBA Exam

How many 6 digit numbers can be formed using 1 to 6 without repetition, such that number will be divisible to its unit place digitNeed help

1) 402
2) 528
3) 648
4) 720

Read Solution (Total 1)

the numbers will end with 1,2,3,4,5,6
the numbers made with last digit as 1 is
5*4*3*2*1=120
similarly for 6 digits is
120*6=720
but in case of 4 the number is not divisible when it is 14,34,54
those combinations are 4*3*2*1=24*3=72(bcoz 14,34,54 (3) combinations)
720-72=648
ans is 648
11 years agoHelpfull: Yes(0) No(0)

MBA Other Question

The number 523abc is divisible by 7,8 and 9. Then a*b*c is?With explanation of course..

1) 180
2) 10
3) 120
4) 240
in 2001,the transportation costs of an item is 35% of its manufacturing cost.from 2001 to 2002,the manufacturing cost of the item has gone up by 25%.the transportation cost in 2002 is 50% of the manufacturing cost in 2002.by what percentage should the total cost in 2002 be reduced so as to bring it back to 2001 level?(manufacturing cost+transportation cost=total cost)?pl. provide sol. also.

1) 21%
2) 38.88%
3) 33.33%
4) 28%