Question

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Answer 1

 Case 1)

“6-8-2 one number is correct and well placed.”

Case 2)

“6-1-4 one number is correct but wrongly placed.”

From Case 1) and Case 2) we an say that 6 is wrong. Because in both two cases 6 is placed at only one position.

So, 6 is removed from all the cases.

Case 3)

“2-0-6 two no.s are correct but placed wrongly.”

6 is already removed. So, left two numbers are 2-0, which are correct.

From Case 1) and Case 3) we can say that 2 is placed at wrong position. As in Case 1) it is put at the last position.

So, 2 is placed at last or third position.

Case 4)

“7-3-8 nothing is correct.”

As, nothing is correct in above case. So, 7, 3 and 8 are removed from all cases.

Case 5)

“7-8-0 one number is correct but wrongly placed.”

From Case 4) 7 and 8 are already removed. So, left one is 0. But 0 is placed at wrong position.

From Case 3) and Case 5)0 is placed at first position.

Now,

Return to the 2nd Case again.

Here in, 6-1-4 one number is correct but wrongly placed.1 is wrong. As it is in middle.

So, 4 is correct but placed at wrong place.

Therefore, 4 is at second position.

So, the correct code is 0 , 4 , 2

Answer 2

➆ ➂ ➇

All Are Wrong.

Hence, In any other set of numbers or in the answer, ➆, ➂, or ➇ do not appear.

➆ ➇ Ⓞ

➆ and ➇ are wrong.

From this set of numbers, we can observe that Ⓞ is correct and is included in the solution set but wrongly placed I .e, Ⓞ can't appear in the first slot from right.

That leaves Ⓞ two positions ...

➁ Ⓞ ➅

Ⓞ is one of the correct numbers.

Other two possibly correct numbers are ➁ and ➅..........[|]

From ➅ ➇ ➁ and ➅ ➀ ➃ we can infer that

➁ is correct.

➃ is incorrect.

Ⓞ can't occupy the second position.

➁ occupies the first slot from the right.

➃ is the middle number.

The Solution Set Is -

Ⓞ ➃ ➁