176.
50 = 5*10 и 60 = 6*10 и НОД(50,60) = 10
21 и 84 = 4*21 и НОД(21,84) = 21
225 = 9 * 25 и 50 = 2* 25 и НОД(225,50) = 25
93 = 1*3*31 и 85 = 1*5*17 и НОД(85,93) =1 (нет общего)
177.
НОД(35,55,45) = 5
НОД(62,74,212) = 2
НОД(102,216,444) = 6 (102=2*3*17, 216=2*2*2*3*3, 444 =2*2*3*37)
НОД(525,555,75) = 3 (522=3*174, 555=3*184, 75 = 3*25)