top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

What is the highest numbered square that is painted blue on a 1x100 square board?

0 votes
514 views

On a board measuring 1x100, each square is numbered from 1 to 100.
Three colors are used to paint the squares from left to right. The following pattern is repeated: one blue square, two red squares, three green squares, one blue, two red, three green and so on.
What is the highest numbered square that is painted blue?

posted Aug 29 by Atindra Kumar Nath

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

It forms an AP
a = 1
d = 5

now by guessing the value of n and finding the one closest to 100 is the answer

1st try = 1 +20*5 = 101 not the answer
2nd try = 1+19*5 = 96

so n-1 = 19
n =20
answer is 20 blocks

answer Aug 30 by Jazzel Time Killer



Similar Puzzles
+3 votes

Can you arrange the numbers from 1 to 9 on a tic tac toe board in a manner that the numbers in each row, column and diagonal adds up to 15. Remember that you have to use all the 9 numbers and thus you cannot repeat.

enter image description here

+1 vote

Imagine there are infinite number of Queens (Chess Game Piece) with u. Find the minimum number of queens required so that every square grid on the chess board is under the attack of a queen. Arrange this minimum no. of Queens on a chess board.

+1 vote

Re-arrange the red and blue balls in the check board in such a way that no two balls of same color falls in the same row horizontally, vertically or diagonally.

enter image description here

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...