Riddles, one at a time
Which Tank Fills?
Video · Hard
Challenge link
Answer
E
The cap stops A. Water takes each lowest open pipe: B, then D, then E.
Which Ring? Dots and Stripes
Video · Easy
Challenge link
Answer
C
Only tile C has a dot AND stripes.
Flip-Flop Gates
Gates start as shown and flip after each box. Where does box 3 land?
Video · Hard
Challenge link
Answer
BIN C
After boxes 1 and 2, box 3 goes left, right, right.
Day After Tomorrow
Video · Easy
Challenge link
Answer
Wednesday
Two days back from Friday: Thursday, then Wednesday.
Climbing Robot
A robot climbs a 10 m wall. Each day it climbs 3 m; each night it slips back 2 m. On which day does it reach the top?
On the last day it does not slip back.
Video · Genius
Challenge link
Answer
Day 8
After night 7 it is at 7 m; day 8 takes it to 10 m.
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