Question

In the following question, select the missing number from the given series. 5, 20, 70, 210, 525, ?

• A. 965
• B. 1050
• C. 840
• D. 12820

Answer 1

Answer:

B. 1050

• To find this answer, we need to identify the pattern in the sequence:

  • 5 × 4 = 20

  • 20 × 3.5 = 70

  • 70 × 3 = 210

  • 210 × 2.5 = 525

  • 525 × 2 = 1050

• The pattern shows that each number is multiplied by a factor that decreases by 0.5 each time:

  • First multiplication: factor of 4

  • Second multiplication: factor of 3.5

  • Third multiplication: factor of 3

  • Fourth multiplication: factor of 2.5

  • Fifth multiplication: factor of 2