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51.	32 + 42 + K2 , K = …………….. A) 10 B) 13 C) 5 D) 25
Answer» Correct option is C) 5 Correct option is (C) 5 \(K^2=3^2+4^2\) = 9+16 = 25 \(=5^2\) \(\Rightarrow\) K = 5.

51.

32 + 42 + K2 , K = …………….. A) 10 B) 13 C) 5 D) 25

Answer»

Correct option is C) 5

Correct option is (C) 5

\(K^2=3^2+4^2\) = 9+16 = 25 \(=5^2\)

\(\Rightarrow\) K = 5.

Discussion

52.	\(\sqrt{121}\) = ...........A) 11 B) 16 C) 31 D) 12
Answer» Correct option is A) 11 Correct option is (A) 11 \(\sqrt{121}=\sqrt{11^2}=(11^2)^\frac12\) \(=(11)^{2\times\frac12}=(11)^1=11.\)

52.

\(\sqrt{121}\) = ...........A) 11 B) 16 C) 31 D) 12

Answer»

Correct option is A) 11

Correct option is (A) 11

\(\sqrt{121}=\sqrt{11^2}=(11^2)^\frac12\) \(=(11)^{2\times\frac12}=(11)^1=11.\)

Discussion