How many – how much?

How many – how much? The engineering department was arranging for a rather expensive catered lunch to bid farewell to their retiring colleague. They calculated that it would cost each person $30. One good mathematician remarked, “It’s lucky that...

Where’s the other dollar?

Where’s the other dollar? Three guys walk into town. They go into a hotel and ask for a room they can share. The clerk has just the thing they want for thirty dollars. The clerk sends them to the room, takes out the ledger, and realizes that he made a mistake....

What is that order and logic?

What is that order and logic? Eon, two, ether, flour, verify, fixes, evens, weight, inner, net, leavened, wavelet, tethering, counterfeit, stiffener, existent, retentiveness, heightened, internecine, noteworthy. These 20 words are given in a definite, logical order....

What percentage?

What percentage? If 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have sinus trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments? Click here for the solution 10...

Probability

Probability Three points are selected at random on a sphere’s surface. What is the probability that they all lie in the same hemisphere?Assume that the great circle, bordering a hemisphere, is part of the hemisphere. Click here for the solution The probability...

Win or lose

Win or lose Half-hearted Betting Major Watson, despite being short of the readies, was feeling in a good mood, so he decided to gamble with his friend Butterworth on the toss of a coin. Starting with just £1, he bet six times, each time wagering half the money he had...