The law of the number in this column is that the second number is one more than the first number, and the third number is one more than the second number More than 2 and so on. What is the remainder of the 1996 number divided by 5 It's also a process,

The law of the number in this column is that the second number is one more than the first number, and the third number is one more than the second number More than 2 and so on. What is the remainder of the 1996 number divided by 5 It's also a process,

a(n+1)-a(n)=n,a(n)=1+n*(n-1)/2
result=[1+1996*1995/2]/5=(1+998*1995)/5
∵ 1 + 998 * 1995 is 1
The remainder of (1 + 998 * 1995) / 5 is 1