Question

Refer to the following series and answer the question (all numbers are single digit numbers only).

(Left) 1 8 7 2 2 4 9 5 3 2 3 3 8 4 7 2 5 6 7 4 9 (Right)

How many such even digits are there each of which is immediately preceded by an odd digit and also immediately followed by a perfect square?

• A. Three
• B. One
• C. Four
• D. Two

Answer 1

Answer:

D. Two

There are 2 such even digits in the series.

The required pattern is Odd Digit → Even Digit → Perfect Square (1, 4, or 9):

1. 3 - 8 - 4:

   • 8 is an even digit.

   • Preceded by 3 (odd).

   • Followed by 4 (perfect square).

2. 7 - 4 - 9:

   • 4 is an even digit.

   • Preceded by 7 (odd).

   • Followed by 9 (perfect square).