self Maths Puzzle

Let n be the number of different 5 digit numbers, divisible by 4 with the digits 1, 2, 3, 4, 5 and 6, no digit being repeated in the numbers. What is the value of n?

Read Solution (Total 1)

Last digits of the 5 digit no are
12,16,24,32,36,52,56,64.
total 8 such no.
And other 3 digits place can be filled by 4*3*2 ways

total= 24*8
= 192 ways
9 years agoHelpfull: Yes(2) No(1)

self Other Question

1 day the principal summoned 1000 students in the quad.. there are 1000 aligned lunch box in the quad..
The principal asked Student number 1 to open every single lunch box, from 1-1000. and asked Student number 2 to come in and close every even lunch box (2,4,6 etc until 1000).
and asked Student number 3 to go to every 3rd lunch box and opens it f its close, and closes it if it s open.
and the 4th student will go to every 4th lunch box and opens it if its close, closes it if its open..
and continues until the 1000th student..
Q: after the 1000th student.. what do u think is the exact number of open lunch-boxes? why? A person starting with 64 rupees and making 6 bets, wins three times and loses three times, the wins and loses occurring in random order. The chance for a win is equal to the chance for a loss. If each wager is for half the money remaining at the time of the bet, then the final result is