In a 4-digit number
So make 4 blanks for the digits:
_ _ _ _
the tens and hundreds digits are 3.
So fill in 3's for the tens and hundreds digits, the
middle two digits:
_ 3 3 _
The ones digit is twice the tens digit.
The tens digit is 3, and twice 3 is 6, so put 6 for the
ones digit:
_ 3 3 6
The thousand digit is the sum of the ones digit and the hundreds digit.
The ones digit is 6 and the hundreds digit is 3, and 6+3=9, so
put 9 for the thousands digit.
Answer:
9 3 3 6
Edwin
