book Maths Puzzle Numerical Ability

What is (2 + 2i)(2 - 2i)?

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ALPHABET
+LETTERS
SCRABBLE Each letter stands for a digit. No two digits can equal the same digit. Find the corresponding digits for each letter to make this a correct A total of 10 pounds of apples and grapes costs $12.30. The apples cost $1.29 per pound and the grapes costs $1.19 per pound. How many pounds of apples are there?