Question 87
Solve the following question:
Write the first five square numbers.
First five square numbers are 12,22,32,42 and 52, i.e. 1, 4, 9, 16 and 25.
Question 108
Find the greatest number of three digits that is a perfect square.
Question 90
Express 81 as the sum of first nine consecutive odd numbers.
The sum of squares of first n natural numbers is given by 16n(n+1)(2n+1) or 16(2n3+3n2+n). Find the sum of squares of the first 10 natural numbers.
Question 87 (i)
Write the greatest common factor in the following:
−18a2,108a