Find how many different 4-digit numbers can be formed from the digits
1, 3, 5, 6, 8 and 9 if each digit may be used only once.
ii/ Find how many of these 4-digit numbers are even

Question

Find how many different 4-digit numbers can be formed from the digits
 1, 3, 5, 6, 8 and 9 if each digit may be used only once.
 ii/ Find how many of these 4-digit numbers are even

anonymous · Answer

You mean... if I will form a 4-digit numbers... I will never use the 4-digit numbers that I've use on the next 4-digit numbers I will form?

anonymous · Answer

so basically it's a permutation/combination qus. if i already have 360 chances of getting a 4-digit number, how many chances will i have of getting a 4-digit number which is even

turingtest · Answer

we have 6 different digits, and four locations to put them

turingtest · Answer

how many different numbers can we put in the first place?
how many in the second?
how many in the third?
how many in the fourth?