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A 4-digit number has its digits increasing strictly from left to right (each digit larger than the one before), like 1357.
What is the GREATEST such 4-digit number?

Class 6Comparing NumbersNumbers
  • A13578
  • B6109
  • C6789
  • D7469

Step-by-Step Solution

For strictly increasing digits, the largest uses the four biggest consecutive digits in order: 6, 7, 8, 9 giving 6789.
Answer: C) 6789

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