Question

No of all four digit no having different digits 1,2,3,4,5, divisible by 4

Answer 1

Answer:

Step-by-step explanation:

Let four digit number — — — —

We know that number is divisible by 4 if it's last two digit are divisible by 4.

So it's unit digit can be 2 or 4 because if unit digit is any of odd number than it is not divisible by 4.

We have two cases:-

1)if reputation of digit allowed:-

Then if unit digit is 2 then we can fill tenth digit with 1 ,3,5 means we have 3 options so

total number=5*5*3*1=75

If unit digit is 4 then we can fill tenth digit with

2 and 4 so we have two option so

Total number=5*5*2*1=50

Both case have or so we add both

Answer=75+50=125