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What is the next number in the series: 5, 10, 20, 40, ...? (2023)

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Question: What is the next number in the series: 5, 10, 20, 40, ...? (2023)

Options:

  1. 50
  2. 60
  3. 70
  4. 80

Correct Answer: 80

Exam Year: 2023

Solution: 

The series is a geometric progression where each number is multiplied by 2. The next number is 40 * 2 = 80.

What is the next number in the series: 5, 10, 20, 40, ...? (2023)

Practice Questions

Q1
What is the next number in the series: 5, 10, 20, 40, ...? (2023)
  1. 50
  2. 60
  3. 70
  4. 80

Questions & Step-by-Step Solutions

What is the next number in the series: 5, 10, 20, 40, ...? (2023)
  • Step 1: Look at the series of numbers: 5, 10, 20, 40.
  • Step 2: Notice how each number is related to the one before it.
  • Step 3: Check how to get from 5 to 10. You multiply 5 by 2 to get 10.
  • Step 4: Check how to get from 10 to 20. You multiply 10 by 2 to get 20.
  • Step 5: Check how to get from 20 to 40. You multiply 20 by 2 to get 40.
  • Step 6: Since each number is multiplied by 2, continue this pattern.
  • Step 7: To find the next number after 40, multiply 40 by 2.
  • Step 8: Calculate 40 * 2, which equals 80.
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