Question

A boy forgot his 4 digit PIN code. But he remember below hints.
1. The first digit is square of the 2nd digit.
2. The sum of the 2nd and 3rd digit is 7.
3. The 4th digit is equal to the 2nd plus 2.
The sum of all the digit is 21.
Can you crack the pin code from above hints

Answer 1

Answer:

Let,

First digit = I

Second digit = Ii

Third digit = III

Fourth digit = IV

Here,

-3 can't be thevalue of 2nd digit, 'cause none of the digits of PIN Code can be negative

Tgerefore, PIN Code is:-

9345