Real numbers mein doubt please 🙏🙏 Upvote kardo answer nahin ho paya to 😭😭

Vo questions that go

‘least number that divides x y and z leaving remainder a’ ‘Least number that divides x y and z leaving same remainder b in each case’ Aise aur kuch types hai bhool gayi mai to please help karo

Har case me kya karein??