Chapter Test: Number Series (Q1): Find the next term in the arithmetic sequence: 10, 15, 20, ?

Subject: Quantitative Aptitude | Topic: Number System | Difficulty: EASY

Options

1. (A) 25
2. (B) 27
3. (C) 22
4. (D) 30
5. (E) 24

Verified Answer

Option (A): 25

10-Second Shortcut Trick

⚡ 10-Second Exam Shortcut: Eliminate options ending in incorrect units or calculate unit digits first before solving full arithmetic.

Step-by-Step Derivation

1. Analyze the given condition or equation.
2. Apply the standard formula or deduction rules.
3. Correct choice is (A): 25

Common Trap to Avoid

⚠️ Common Trap: Misreading inverse proportions or rushing calculation in the last algebraic step.

Exam Tip

💡 Exam Tip: Always verify if question asks for perimeter, area, or remaining fraction.

Related Practice Questions in Number System

• Which digits should come in place * and $, respectively, if the number 72864*$ is divisible by both 8 and 5?
• The HCF of two numbers is 12. Which one of the following can never be their LCM?
• If the 4-digit number x67y is exactly divisible by 9, then the least value of (x + y) is_____.
• Which of the following pairs of non-zero values of p and q make the 6-digit number 674pq0 divisible by both 3 and 11?

Practice more Number System questions in SSC CGL Complete Test Series 2026.

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