Logical Problems

(31) If you have a 3-gallon jug and a 5-gallon jug, how can you measure exactly 4 gallons of water?

(a) Fill the 3-gallon jug and pour it into the 5-gallon jug. Fill the 3-gallon jug again and carefully pour it into the 5-gallon jug until the 5-gallon jug is full. You are left with 1 gallon in the 3-gallon jug. Empty the 5-gallon jug and pour the 1 gallon from the 3-gallon jug into it. Now, fill the 3-gallon jug one more time and pour it into the 5-gallon jug. You now have exactly 4 gallons in the 5-gallon jug.
(b) Fill the 5-gallon jug to the top and pour it into the 3-gallon jug. This leaves you with exactly 2 gallons in the 5-gallon jug. Empty the 3-gallon jug, and pour the 2 gallons from the 5-gallon jug into it. Now, fill the 5-gallon jug to the top again and carefully pour it into the 3-gallon jug until it’s full. You now have exactly 4 gallons in the 5-gallon jug.
(c) Fill the 3-gallon jug to the top and pour it into the 5-gallon jug. Fill the 3-gallon jug again and pour it into the 5-gallon jug until the 5-gallon jug is full. You are left with 1 gallon in the 3-gallon jug. Empty the 5-gallon jug and pour the 1 gallon from the 3-gallon jug into it. Now, fill the 3-gallon jug one more time and pour it into the 5-gallon jug. You now have exactly 3 gallons in the 5-gallon jug.
(d) It’s impossible to measure exactly 4 gallons with a 3-gallon jug and a 5-gallon jug.

(32) If a doctor gives you 5 pills and tells you to take one pill every half-hour, how long would it take before you’ve taken all the pills?

(33) If you have a square room and there are four corners in it, and in each corner, there is a cat, how many cats are there in total?

(34) What has keys but can’t open locks and can sing but can’t talk?

(35) If you have three apples and you take away two, how many apples do you have?

Post Views: 4

Pages: 1 2 3 4 5 6 7 8 9 10

Trending