Question

square root of 121 by repeated subtraction method​

Answer 1

Answer:

square root of 121 is 11

Hope this helps you....

Step-by-step explanation:

because 11×11=121

Answer 2

Step-by-step explanation:

We know that the sum of the first n odd natural numbers is n2. We will use this fact to find square root of a number by repeated subtraction. Let us take an example to learn this method. Say, you are required to find the square root of 121, that is, √121. The steps are:

121 – 1 = 120

120 – 3 = 117

117 – 5 = 112

112 – 7 = 105

105 – 9 = 96

96 – 11 = 85

85 – 13 = 72

72 – 15 = 57

57 – 17 = 40

40 – 19 = 21

21 – 21 = 0

Thus, we have subtracted consecutive odd numbers from 121 starting from 1. 0 is obtained in the 11th step. So we have √121 = 11.

hope this helps you to solve ur sum