"what should come in place of the question mark &#39;?&#39; in the following number series?

1005, 1000, 985, 960, 925, ?"
"what should come in place of the question mark &#39;?&#39; i"
"calculation:

the series follows the following pattern:

⇒ 1005 – 5 = 1000

⇒ 1000 – 15 = 985

⇒ 985 – 25 = 960

⇒ 960 – 35 = 925

⇒ 925 – 45 = 880

∴ the value of ? is 880"