If $ 10\times 10 = 1, 20\times 20 = 4, $ then $ 30 \times 30 $ = ?
If $ 10\times 10 = 1, 20\times 20 = 4, $ then $ 30 \times 30 $ = ?
यदि $ 10\times 10 = 1, 20\times 20 = 4, $ तो $ 30 \times 30 $ = ?
Detailed Solution & Logic
Correct Answer:
9
Solution
100 to first number choose
$ 10 \times 10 = 100 $
100 to first number choose
=1
same pattern
$ 20 \times 20 = 400 $
Answer = 4
$ 30 \times 30 = 900 $
Answer =9
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