1. The guy in the pic is Roger Penrose, who, along with his father Lionel, created the Penrose stairs or the impossible stairs.
cracked by Sticky.
2. Cafe Coffee Day, started by VG Siddhartha Hegde, SM Krishna's son-in-law.
cracked by Ashok (credit for pointing out that funda), Sticky and Sundaram
X: Jolyon Wagg
Z: Capn. Haddock
cracked by Sticky and Devang Ghia
4. Time displayed on all ads.
Explained by some big shot from Apple: "We design the (product launch) keynotes so that the big reveal of the product happens around 40 minutes into the presentation. When the big image of the product appears on screen, we want the time shown to be close to the actual time on the audience's watches. But we know we won't hit 40 minutes exactly."
cracked by Omkar and Sticky.