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Articles tagged with #puzzle
Arjun has recently learnt about averages, and he says the following two sentences: A: The average age of ten of his coaching class students is 15 B: After one student left, the average has become 17 Roshan who hears this says the following C: No it c...
Adya writes down an integer. She tells Sidhu that the following is true: 1. Subtracting 35 from her integer gives a positive result. 2. Multiplying her integer by 2, then subtracting 90 gives a negative result. How many different integers could Adya ...
Maddy painted a rectangular block on all six faces and then cuts it into exactly 110 unit cubes. Eight of these cubes have exactly three faces painted. How many of these cubes have exactly two faces painted?
There are 100 doors and all closed. There are 100 magicians. The first magician ways his wand, and opens every door. The second magician ways the wand closing the 2nd, 4th, 6th,…, all the even-numbered doors. The third magician ways the wand on the 3...
You are blindfolded and 100 coins are placed in front of you on the table. You are allowed to touch the coins but you can’t tell whether they are facing heads or tails by touching them. You are told that there are 50 coins head up, and 50 coins tails...
There are 3 jars, namely, A, B, C. All of them are mislabelled. Jar A contains red marbles, jar B contains blue marbles and Jar C contains red and blue marbles mixed in a random proportion. You can put your hand in a jar and pick only one at a time. ...
