MHB What is the missing number in this mathematical puzzle? 423=?

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The mathematical puzzle presents a series of equations where the first number corresponds to a transformed output. The examples given are 398=964, 118=164, and 356=936. Participants are trying to deduce the pattern to determine what 423 equals. The discussion includes requests for hints, indicating a collaborative effort to solve the puzzle. The final answer for 423 remains unresolved within the thread.
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398=964
118=164
356=936
423=?

What does 423 equal?
 
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LightningGirl said:
398=964
118=164
356=936
423=?

What does 423 equal?

Hey LightningGirl! Welcome to MHB! ;)

Can you give me a hint? (Sweating)
 
I like Serena said:
Hey LightningGirl! Welcome to MHB! ;)

Can you give me a hint? (Sweating)

First digit and last digit squared then put together.
I checked greg's solution and seems like it's also what he thought.
 

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