Dart Puzzle

 

 

 

3

Similarity problem

 Source: Core Math, India

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Dogs

 

Source: Puzzle Move

Difference of squares

  

 

Source: 

Jonathan Hall

@StudyMaths

Palindromic times

 

 

 

 

 

 

 

 

1. A time such as 3:59:53 is palindromic, that is, it reads the same forward and backward. in a day starting from 0:00:00 to 23:59:59, there are 660 occasions when the time is palindromic. Among them which of the two is closest?

    

    

   Source: Nobuyuki Yoshigahara
   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

09:59:59 and 10:00:01

Lucky Seven

 

 

 [Resource]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(95/247)+(86/13)

 

 

 

 

 

 

Cutting Puzzle

 This lovely puzzle is from professor Tanya Khovanova's blog.

You are given a 5-by-7 rectangle with two corners cut out: A 1-by-1 tile is cut from the bottom left corner, and a 1-by-2 tile is cut out of the top right corner, as in the picture. The task is to cut the resulting shape into two congruent polyominoes.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Significant Figures [Volume 2 Issue 4]

 

Significant Figures [Volume 2, Issue 3] [Download]

 

 

 

 

 

Significant Figures [Volume 2 Issue 3]

Significant Figures [Volume 2, Issue 3] [Download]

 

 

 

 
 

Cryptarithm: Thirty

  

Answer: 810386

Cryptarithm: Joking

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answer: 571428

Cryptarithm

 

391+803+803+84611+84611=171219

Cryptarithm: "NO GUN NO HUNT"

 

 

87+908+87=1082

Significant Figures [Volume 2, Issue 2]

 

Significant Figures [Volume 2, Issue 2] [Download]

 

 

 

 

 

 

Perimeter

 

 

 

 

source: Sunil Singh

A line and a quadratic

 

Significant Figures [Volume 2, Issue 1]

 

Significant Figures [Volume 2, Issue 1] [Download]