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Find the odd one out: 9, 18, 27, 36, 45, 54, 63, 72, 80.

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Question: Find the odd one out: 9, 18, 27, 36, 45, 54, 63, 72, 80.

Options:

  1. 9
  2. 27
  3. 45
  4. 80

Correct Answer: 80

Solution: 

All numbers except 80 are multiples of 9. 80 is the odd one out.

Find the odd one out: 9, 18, 27, 36, 45, 54, 63, 72, 80.

Practice Questions

Q1
Find the odd one out: 9, 18, 27, 36, 45, 54, 63, 72, 80.
  1. 9
  2. 27
  3. 45
  4. 80

Questions & Step-by-Step Solutions

Find the odd one out: 9, 18, 27, 36, 45, 54, 63, 72, 80.
  • Step 1: Look at the list of numbers: 9, 18, 27, 36, 45, 54, 63, 72, 80.
  • Step 2: Check if each number is a multiple of 9.
  • Step 3: 9 is a multiple of 9 (9 x 1 = 9).
  • Step 4: 18 is a multiple of 9 (9 x 2 = 18).
  • Step 5: 27 is a multiple of 9 (9 x 3 = 27).
  • Step 6: 36 is a multiple of 9 (9 x 4 = 36).
  • Step 7: 45 is a multiple of 9 (9 x 5 = 45).
  • Step 8: 54 is a multiple of 9 (9 x 6 = 54).
  • Step 9: 63 is a multiple of 9 (9 x 7 = 63).
  • Step 10: 72 is a multiple of 9 (9 x 8 = 72).
  • Step 11: Check 80: 80 is not a multiple of 9.
  • Step 12: Conclude that 80 is the odd one out because it is not a multiple of 9.
  • Multiples of 9 – The question tests the ability to identify numbers that are multiples of a specific integer, in this case, 9.
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