JAMIA 2026 — Reasoning PYQ

The correct option is (c) 15.

Logic and Pattern Detection

Let us analyze the differences between consecutive numbers in the given sequence:

• First term to second term:

  $$3-1=2$$

• Second term to third term:

  $$6-3=3$$

• Third term to fourth term:

  $$10-6=4$$

The pattern shows that the difference between consecutive terms increases by $1$ each time ($+2,+3,+4,\dots$). These numbers are also known as triangular numbers.

Finding the Next Term

Following the established pattern, the difference between the fourth term ($10$) and the missing fifth term must be $+5$:

$$\text{Next Number}=10+5$$

$$\text{Next Number}=15$$

Conclusion

The next number in the series is 15, which perfectly matches option (c).