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Difficulty: 2 of 5 Latest: Grandma's age (in Just Math)
When Grandma was asked about her age she told her grandchildren the following:
-"If the age of the oldest of you will be added to the product of ages of the younger two,- you would get my current age."
The three boys, Alex, Bob and Cid, started their thinking, but only Bob, the middle child provided the correct answer and added:
"If we had to perform the above operations a year ago - we would be off by 14 years...
What were the boys' Grandma's ages, given Alex's age was a prime number?
(No Solution Yet, 7 Comments) Submitted on 2014-08-20 by Ady TZIDON   
Difficulty: 3 of 5 Bonus: A surprise exam (in Paradoxes) Rating: 3.33
A professor tells his class that he will give them a surprise examination sometime next week.

For our purposes, an examination is considered a "surprise" if on that day, the class is not 100% sure that they will get an examination. (If they only suspect it, the examination can still be a surprise.)

Having given the class this warning, is it still possible for the professor to give them a surprise examination next week? (Assume that he will not give them an exam if it will not be a surprise.)

(Solution Posted, 39 Comments) Submitted on 2002-04-26 by levik   
Difficulty: 2 of 5Square Cut (in Shapes)
Posted on 2014-08-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pandigital Ponder II (in Just Math)
Posted on 2014-08-19 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Test #4 (in General)
Posted on 2014-08-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quaint Quadruplets (in Just Math)
Posted on 2014-08-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Crossnumber IV (in General) Rating: 1.50
Posted on 2014-08-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Six tangents (in Just Math)
Posted on 2014-08-17 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Known to you? (in General)
Posted on 2014-08-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Geometric and Arithmetic Area (in Shapes) Rating: 4.00
Posted on 2014-08-15 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three subsets (in Just Math)
Posted on 2014-08-15 by Ady TZIDON (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Cutting corners. (in Shapes)
Posted on 2014-08-14 by broll (Solution Posted, 5 Comments)
Difficulty: 2 of 5Quadruplet Query (in Just Math) Rating: 3.00
Posted on 2014-08-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pandigital Ponder (in Just Math)
Posted on 2014-08-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Test #3 (in General)
Posted on 2014-08-13 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Some Triangles Sum 2014 (in Just Math)
Posted on 2014-08-12 by K Sengupta (No Solution Yet, 5 Comments)

Recently Posted Solutions:
Difficulty: 3 of 5Cutting corners. (in Shapes)
Submitted By broll. Solution posted on 2014-08-19 02:24:08
Difficulty: 3 of 51 Isosceles into 6 (in Shapes)
Submitted By Dustin. Solution posted on 2014-08-18 15:56:20
Difficulty: 2 of 5Find a Frenzy Fibo (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2014-08-14 06:06:30
Difficulty: 2 of 5The twelve(!) tribes(?) (in General)
Submitted By Ady TZIDON. Solution posted on 2014-08-14 05:19:48
Difficulty: 3 of 5Test #1 (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2014-08-05 10:25:27
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