Digited square

Power on the pocket calculators !
Find an 8 digit number, perfect square, the number made of its 4 last digits is one more than the number made of the 4 first digits.
Solution

Training :
Find a two digit number, perfect square, the second digit is one more than the first (beginning easy...).
What's that, no one ? why then ?

Well, let's try a 4 digit number... still none ? are you sure ?

Well, 6 digits then ... Solution

And now the pocket calculator is hot, 10 digits... Solution

12 digits, raa sh..., my calculator displays just 10 digits ... Solution

Details

 

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