Number series

Quantitative Aptitude(IBPS PO)

Title

45:30

8 of 24 completed

5 of 15 completed

38 of 100 completed

8 of 20 completed

Indian Economy - Understanding the basics of Indian economic system

Direction: What will come in the place of question mark in following number series:

1, 1, ?, 15, 105, 945

This questions was previously asked in

IBPS PO Prelims 2020

1.5

2.5

- To find the pattern, we look at the sequence: 1, 1, ?, 15, 105, 945.

- Notice the relationships:

- \(1 \to 1\): Unchanged, multiplied by 1.

- \(1 \to ?\): Need to determine the multiplier.

- \(? \to 15\) is obtained by a certain multiplier.

- Multiply 15 by 7 to get 105.

- Multiply 105 by 9 to get 945.

- Assume the pattern involves multiplying by consecutive odd numbers: 1, 3, 5, 7, 9.

- The missing step is obtained by multiplying 1 by 3 to get 3.

- Correct Answer: Option 2, 3