Divisibility by 11: If the difference of sum of digits at odd places and sum of digits at even places, is divisible by 11, then the number is divisible by 11.
9361 = (3+1) - (9+6)= 4-15=11 which is divisible by 11.
Divisibility by 4: If the last two digits is divisible by 4, then the number will be divisible by 4.
88 is divisible by 4 so 47388 is divisible by 4.
Divisibility by 5: Any number, which ends with 0 or 5 is divisible by 5.
89900 is ends with 0 and thus divisible by 5.
Divisibility by 9: If the sum of the digits of a number is divisible by 9, then the number is divisible by 9.
723483 - 7+2+3+4+8+3=27 which is divisible by 9