Wardrobe code
Lucia has a lock on her wardrobe that opens with a 4-digit code (such as 0000, 0089, or 9123).
Lucia forgot her code. But she knows that the sum of all four digits of her code is 4. How many such codes are there?
Your answer:
Lucia forgot her code. But she knows that the sum of all four digits of her code is 4. How many such codes are there?
Your answer:
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You need to know the following knowledge to solve this word math problem:
combinatoricsalgebrabasic operations and conceptsnumbersGrade of the word problem
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