If $${\text{ }}2*3 = \sqrt {13} $$ and 3 * 4 = 5, then the value of 5 * 12 is ?
A. $$\sqrt {17} $$
B. $$\sqrt {29} $$
C. 12
D. 13
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & {\text{Clearly, }}a*b = \sqrt {{a^2} + {b^2}} \cr & \therefore 5*12 \cr & = \sqrt {{5^2} + {{12}^2}} \cr & = \sqrt {25 + 144} \cr & = \sqrt {169} \cr & = 13 \cr} $$Related Questions on Square Root and Cube Root
The least perfect square, which is divisible by each of 21, 36 and 66 is:
A. 213444
B. 214344
C. 214434
D. 231444
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