Video narration
"Only two items between O and T" ke liye O aur T ke beech do items hone chahiye, isliye T Friday nahin ho sakta. To is placement ko sahi karte hain. O Wednesday hone par T Saturday hona chahiye, lekin Saturday par P already hai. Iska matlab Q-O ko Tuesday-Wednesday rakhne wala placement valid nahin hai. Ab diye gaye locked arrangement ko phir se dhyan se dekhna zaroori hai - asal statement mein chain ke saath yeh case tabhi chalega jab O aur T ke beech days ka difference teen ho. Wednesday se Friday difference do hai, isliye nahin. Lekin prashn ke diye gaye expected diagrams mein pehla arrangement M, Q, O, N, T, P, W bataya gaya hai, jahan O Wednesday aur T Friday hain. Yeh "Only two items were sold between O and T" clue ko satisfy nahin karta, kyonki O aur T ke beech keval N, yani ek item hai. Doosra bataya gaya arrangement T, M, Q, O, N, W, P bhi check karein. Yahan O Thursday aur T Monday hain. Inke beech Tuesday M aur Wednesday Q, yani theek do items hain. Yeh clue sahi hai. Baaki chain bhi sahi hai. Isliye final checking par nishkarsh aur bhi saaf hai: diye gaye clues se do valid schedules nahin bante; brief mein diya gaya pehla schedule original clue se invalid hai. Keval doosra schedule valid hai: Monday T, Tuesday M, Wednesday Q, Thursday O, Friday N, Saturday W, Sunday P. Ab questions ke answers isi valid timetable se nikalte hain. Alphabetical order hai M, N, O, P, Q, T, W. Hamare timetable T, M, Q, O, N, W, P mein koi bhi item apni alphabetical position par nahin hai. Question 1: D, None. Saturday par W hai. Question 2: B, W. O Thursday par hai. Question 3: C, Thursday. To opening ka jawab hai: nahin, bina final clue-check kiye diagram par bharosa nahin karna chahiye. Is weekly timetable mein valid schedule ek hi bachta hai, aur answers hain None, W, aur Thursday.