Question

Ramu marked a dot in first square, 2dots in second square ,3dots in the third square ando so on .then the total number of square required to mark a total of 55 dots is equal to

Answer 1

Welcome friend,

◆ Answer -

10 squares

● Explanation -

Ramu marked dots in squares in pattern,

1, 2, 3, 4,..., n.

Total no of dots marked by Ramu will be -

Sn = 1 + 2 + 3 + ... + n

55 = n(n+1)/2

n(n+1) = 110

n × (n+1) = 10 × 11

Thus, we can say that

n = 10

Therefore, 10 squares will be required to mark a total of 55 dots by Ramu.

Thanks dear...

Answer 2

Answer:

answer is 10 and the solving is given above