Which is the smallest four digit even number that can be formed using each of the digits 6, 7, 8 and 9 once only?
Question and options
Which is the smallest four digit even number that can be formed using each of the digits 6, 7, 8 and 9 once only?
- 7986
- 6798
- 6789
- 9876
Answer and explanation
Correct answer: B - 6798
An even number must end in 6 or 8. Smallest arrangement: begin with the smallest digit 6, then 7, then 9, ending in 8 gives 6798 (6789 is smaller but odd).
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CUSAT CAT Five-Year LL.B.
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