How do i aound 4,626 to the nearest thousands

the 4 is in the thousands place so we look at the 6

it is 5 or greater so we round  the 4 up to 5

5000

Answer 5000

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

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