CONCEPT used :HCF is the highest common factor If 3 NUMBERS A, B and C are divided by a greatest number 'P' and leaves the same remainder each time, then the value of P will be HCF of (A - B) (B - C) and (A - C) Calculations :We have to FIND HCF of (1134 - 1062), (1182 - 1134) and (1182 - 1062)1134 - 1062 = 72 1182 - 1134 = 48 1182 - 1062 = 120 ⇒ 72 = 23 × 32 ⇒ 48 = 24 × 3 ⇒ 120 = 23 × 3 × 5 HCF of 72, 48 and 120 is 23 × 3 = 24 (24 is the highest common factor among all)Now,Remainder when 1062 is divided by 24 is 6 So, x = 24 and y = 6 ⇒ x - y = 24 - 6⇒ 18 ∴ The value of (x - y) will be 18