Explanation:

Let's analyze the given number series:

313, 623, 933, 1243, ?

Step 1: Identify the pattern

Find the difference between consecutive terms:

• 623 - 313 = 310
• 933 - 623 = 310
• 1243 - 933 = 310

Each term increases by 310.

Step 2: Find the next term

• 1243 + 310 = 1553

Correct Answer:

(B) 1553