Hi! ⋇
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The first digit of this number is 3², which is 9.
The Number is : 9xx
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The second digit is: -2·(-4)=8.
The Number is : 98x.
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The sum of all the digits is 18. This gives us an equation that we can solve in terms of x!
(x is the digit we are looking for)
Now it takes a little arithmetic to find x :)
. Just subtract 17 from both sides to find x!
. And Now, can you see the number!
It's 981, of course :)
Hope this made sense to you!
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