Chess Masters.

How many squares are there in a chessboard.?


The answer is 204.

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5 solutions

firstly, there is 8x8 tinniest squares area of 1x1. now,the actual part begins. you need to visualize the fact. if you consider squares of area of 2x2, then notice that such squaes are 7 in rows and 7 in columns. that means such squres are 7x7=49 in number. in this way, 8x8+7x7+6x6+5x5+4x4+3x3+2x2+1x1= 204 :)

if you count 1x1 sized squares, there are 8 such squares in a column and 8 in row. similarly, if u count 2x2 sized squares, there are 7 in row and 7 in column. proceeding in this way, finally u'll get 8x8 sized square only 1. so the answer is 1x1+2x2+3x3+4x4+5x5+6x6+7x7+8x8=204

Md. Mohaiminul Islam - 6 years, 11 months ago

বুঝি নাই :(

Tanjim Faruk - 6 years, 11 months ago
Wwert Sear
Jun 6, 2014

Consider a chessboard 8*8. Total number of squares are : 8*8+7*7+6*6+5*5+4*4+3*3+2*2+1*1 = 204

nice solution

Mayank Holmes - 7 years ago
Raiyun Razeen
Jan 8, 2015

For a n × n n \times n board, the total number of squares is

1 2 1^{2} + 2 2 2^{2} + 3 2 3^{2} + ........ + n 2 n^{2}

Since, a chessboard is a 8 × 8 8 \times 8 board, the total number of squares is

1 2 1^{2} + 2 2 2^{2} + 3 2 3^{2} + ........ + 8 2 8^{2} = 204 \boxed{204}

There is a formula for the sum of squares of the integers which is:

1^2 + 2^2 + 3^2 + ... + n^2

The chessboard is 8 by 8. Therefore,

1^2+2^2+3^2+4^2+5^2+6^2+7^2+8^2=204

Pankaj Nirwan
Jul 14, 2014

There are actually 204 squares on a chessboard. Surprised! Here is the explanation. There are 64 (1x1) squares. There are 49 (2x2) squares. There are 36 (3x3) squares. There are 25 (4x4) squares. There are 16 (5x5) squares. There are 9 (6x6) squares. Then there are 4 (7x7) squares and 1 big 8x8 square. So, there are a total of 204 squares on a normal chessboard!!!.

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