RRB NTPC Graduate Tier 1

2025

Shift-2

Computer Knowledge 5

All Questions 5 Hardware & Software 1 Keyboard Shortcuts 1 Operating Systems 1 Software Tools 2

Economics 2

All Questions 2 Indian Economy 1 Reports and Indices 1

General Awareness 33

All Questions 33 Ancient History 2 Appointments 1 Biology 1 Chemistry 1 Current Affairs 8 General Science 1 Geography 4 Government Schemes 3 Literature 2 Modern History 3 Polity 6 Sports 1

Mathematics 30

All Questions 30 Age Problems 1 Algebra 3 Arithmetic 1 Averages 1 Compound Interest 1 Geometry 1 HCF & LCM 1 Heights and Distances 1 Mensuration 3 Number System 2 Percentages 1 Profit and Loss 3 Ratio & Proportion 2 Simple Interest 1 Simplification 2 Speed, Time and Distance 2 Statistics 2 Time & Work 1 Time and Work 1

Reasoning 30

All Questions 30 Alphabet Series 1 Alphanumeric Series 3 Analogy 4 Blood Relations 1 Classification 2 Coding-Decoding 3 Direction Sense 2 Mathematical Operations 3 Number Analogy 1 Number Operations 1 Number Series 3 Puzzles 1 Ranking 1 Seating Arrangement 3 Syllogism 1

Mathematics

Number System

EN हिंदी

✕

RRB NTPC Graduate Tier 1 2025 Shift-2 📅 06 Jun, 2025

The average of first 13 whole numbers is:

A

6

B

6.5

C

5

D

7

Result Summary

APEDIA

RRB NTPC Graduate Tier 1

2025 • 06 Jun, 2025 • Shift-2

The average of first 13 whole numbers is:

Correct Answer

6

Concept of Whole Numbers: Whole numbers initiate from zero. Therefore, the first 13 whole numbers constitute the set {0, 1, 2, ..., 12}.Summation Logic: The sum......

💡 Analysis & Explanation

Concept of Whole Numbers ▼

Whole numbers initiate from zero. Therefore, the first 13 whole numbers constitute the set {0, 1, 2, ..., 12}.

Summation Logic ▼

The sum of the first 'n' natural numbers is n(n+1)/2. The sum of numbers from 1 to 12 is (12 × 13) / 2 = 78. Adding the zero does not change the sum (78 + 0 = 78).

Calculating Average ▼

The average is the total sum divided by the number of elements. Thus, 78 ÷ 13 = 6.

Conclusion ▼

The correct average is 6.