What is the minimum number of sticks needed to add three more equilateral triangles to it?

0 votes

169 views

You are given an equilateral triangle of three matchsticks like given figure. What is the minimum number of sticks needed to add three more equilateral triangles to it?

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Anti-spam verification:

To avoid this verification in future, please log in or register.

1 Answer

0 votes

Ans Three more sticks to be added to add three equilateral triangles
Three sticks are to be placed in midpoint of existing match sticks to form four equilateral triangles (1+3)

John wants to send a letter to Peter, who lives on Tesla Street.
John doesn't remember the house number. However, he knows that it has 4 digits, it is a multiple of 5 and 7 and that the last digit is 0. What is the minimum number of letters that John has to send to be sure that Peter receives his letter?