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Find the odd number in the series: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

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Question: Find the odd number in the series: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

Options:

  1. 9
  2. 12
  3. 15
  4. 21

Correct Answer: 9

Solution: 

All numbers are multiples of 3 except 9, which is not a multiple of 6.

Find the odd number in the series: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

Practice Questions

Q1
Find the odd number in the series: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.
  1. 9
  2. 12
  3. 15
  4. 21

Questions & Step-by-Step Solutions

Find the odd number in the series: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.
  • Step 1: Look at the series of numbers: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.
  • Step 2: Identify the pattern in the series. All numbers are multiples of 3.
  • Step 3: Check each number to see if it is also a multiple of 6.
  • Step 4: Notice that 3, 6, 12, 18, 24, and 30 are multiples of 6.
  • Step 5: Check the number 9. It is a multiple of 3 but not a multiple of 6.
  • Step 6: Conclude that 9 is the odd number in the series.
  • Multiples of 3 – The series consists of numbers that are all multiples of 3.
  • Identifying Odd One Out – The task is to identify which number does not fit the established pattern.
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