Archive for August, 2010
There are 5 squares in this image. By moving only 2 matchsticks make seven squares.
(Overlapping or breaking of matchsticks is not allowed)
Find the smallest 4 digit number meeting the following criteria:
- First digit is 1/3 of the second digit.
- Third digit is the sum of the first and second digit.
- The last digit is thrice the second digit.
Answer on Friday.
Sam keeps marbles in a box everyday in such a way that the number of marbles in the box doubles with each passing day. For e.g., he puts in 1 marble on the first day, 2 on the second day, 4 on the third day and so on. The box gets full on the 18th day. On which day was the box half full?
Answer on Monday.