1.
What will come in place of the question mark (?) in the following questions ?$$\sqrt{?}+19^{2}=21^{2}$$
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By: anil on 05 May 2019 03.17 am
Let the number to replace the question mark be equal to $$X$$
So, $$sqrt{X}+19^{2}=21^{2}$$
Therefore $$sqrt{X} = (21-19) imes (21 +19) = 2 imes 40 = 80$$
Hence, $$X = 80^2 = 6400$$
By: anil on 05 May 2019 03.17 am
Let the number to replace the question mark be equal to $$X$$
So, $$sqrt{X}+19^{2}=21^{2}$$
Therefore $$sqrt{X} = (21-19) imes (21 +19) = 2 imes 40 = 80$$
Hence, $$X = 80^2 = 6400$$
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So, $$sqrt{X}+19^{2}=21^{2}$$
Therefore $$sqrt{X} = (21-19) imes (21 +19) = 2 imes 40 = 80$$
Hence, $$X = 80^2 = 6400$$