The digits 6, 2, 9, and 5 are written on four cards as shown:
The cards can be rearranged to make different four-digit numbers, for example:
9 6 5 2 = 9652 - Junior Cycle Mathematics - Question 1 - 2014
Question 1
The digits 6, 2, 9, and 5 are written on four cards as shown:
The cards can be rearranged to make different four-digit numbers, for example:
9 6 5 2 = 9652.
Rear... show full transcript
Worked Solution & Example Answer:The digits 6, 2, 9, and 5 are written on four cards as shown:
The cards can be rearranged to make different four-digit numbers, for example:
9 6 5 2 = 9652 - Junior Cycle Mathematics - Question 1 - 2014
Step 1
Rearrange the cards to give an odd number:
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Answer
To create an odd number, we must ensure the last digit is one of the odd digits available, which are 9 and 5. Using the digits 5, 6, 2, and 9, one possible arrangement is:
Therefore, any number using the digits that ends in 9 or 5, such as 5629, is valid.
Step 2
Rearrange the cards to give the smallest possible number:
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Answer
To find the smallest possible number using all four digits, arrange them in ascending order. The smallest arrangement of the digits 2, 5, 6, and 9 is:
Step 3
Insert operators for 3 2 5 = 6:
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Answer
The equation can be correctly formed by inserting the subtraction operator between 3 and 2, like this:
3 - 2 + 5 = 6.
Step 4
Insert operators for 3 2 5 = 1:
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Answer
The correct equation can be achieved by placing the subtraction operator in this manner:
3 - 2 - 5 = 1.
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