Find out accurate no. to replace "?".
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Answered by
33
Solution :-
In First ∆ we have Digits :- 7 --- 4 ---- 3 & inside = 42.
Let See The Logic :-
→ (Down Digit)² - [ (Right digit)² + Left Digit)² ] = xy = Reciprocal of xy = yx = Our Answer .
Check :-
∆ 1 :-
→ (7)² - [ 4² + 3² ]
→ 49 - (16 + 9)
→ 49 - 25
→ 24
→ Reciprocal
→ 42 (Ans).
Similarly, ∆ 2 :-
→ (8)² - [ 6² + 3² ]
→ 64 - (36 + 9)
→ 64 - 45
→ 19
→ Reciprocal
→ 91 (Ans).
Hence, Similarly, ∆ 3 :-
→ 9² - [ 5² + 3² ]
→ 81 - (25 + 9)
→ 81 - 34
→ 47
→ Reciprocal
→ 74 (Ans). = Option D.
Hence, we can say That, 74 is Correct Answer .
Answered by
21
Logic :-
(Down Digit)² - [ (Right digit)² + Left Digit)² ] = xy = Reciprocal of xy = yx = Our Answer .
Checking in first we get :-
= (7)² - [ 4² + 3² ]
= 49 - (16 + 9)
= 49 - 25
= 24
= Reciprocal
= 42
Similarly, in second :-
= (8)² - [ 6² + 3² ]
= 64 - (36 + 9)
= 64 - 45
= 19
= Reciprocal
= 91 (Ans).
Hence, Similarly, in Last also we do same :-
=9² - [ 5² + 3² ]
= 81 - (25 + 9)
= 81 - 34
= 47
= Reciprocal
= 74 = Option D is correct.
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