Quant by Krishna Sir

“The average of x numbers is 3x. If x−1 is subtracted from each given number, what will be the new average?”
Shortcut Trick 👇
अगर हर number से same value subtract होती है,
तो Average से भी वही value subtract होती है।

Given Average = 3x
Subtracted Value = x−1
New Average = 3x − (x−1)
= 3x − x + 1
= 2x + 1
Final Answer = 2x + 1 ✅

Useful for SSC, Banking, Railway, CDS, CAT & all Competitive Exams.

, , , , , ,

The average of 40 numbers is 405. If each number is divided by 15, then what will be the average of the new set of numbers?

👉 Average Rule:
If every number is divided by the same number, then the average is also divided by that number.

✅ New Average = 27
Perfect question for SSC, Banking, Railway, CDS, CAT & all Competitive Exams.
Learn Maths Tricks & Fast Calculation with Krishna Sir 🚀

“The average of 8 numbers is 21. If each number is multiplied by 8, find the average of the new set of numbers.”

✅ Trick:
If every number is multiplied by the same number, then the average is also multiplied by that number.
Old Average = 21
New Average = 21 × 8 = 168

📚 Best shortcut tricks for SSC, Banking, Railway & Competitive Exams by Krishna Sir.
🎯 Learn Maths in the fastest and easiest way with smart tricks.

Follow for more Quant tricks daily

In this video, we solve a simple but tricky averages problem!

🔢 Question: The average of 8 numbers is 14. If 2 is subtracted from each given number, what will be the new average?

✅ Answer: 12

📖 What You'll Learn:
- How to find the new average when a number is subtracted
- Shortcut trick for average problems
- Step-by-step solution explained clearly

🧮 Solution:
Sum of 8 numbers = 8 × 14 = 112
New Sum = 112 - (2 × 8) = 96
New Average = 96 ÷ 8 = 12

⚡ Shortcut: When the same value is subtracted from each number, the average decreases by that same value!

👍 Like, Share & Subscribe for more Math tricks and shortcuts!

If Average of N Consecutive Even Numbers is K,
What Will Be the Average If We Include Two More
Successive Terms? 🤯 | Math Shortcut

😱 Most students get this WRONG! Watch till the
end to see the magic of consecutive even numbers! 🔥

✅ Quick formula
✅ No lengthy calculations
✅ Perfect for competitive exams!

📚 Useful for:
SSC | BANK PO | CAT | UPSC | Railway Exams

🔔 Follow for daily Math Shortcuts & Tricks!
👍 Like if this helped you!
💬 Comment your answer below!

The average of 5 consecutive even numbers is k. If one more consecutive even number is included, then what will be the new average?

👉 Consecutive Even Numbers Trick:
5 consecutive even numbers ka average हमेशा middle number होता है।
Agar ek aur consecutive even number include kar diya जाए, तो average 1 se increase हो जाता है।
New Average = k + 1

Competitive exams like SSC, Banking, Railway, CDS, CAT, NDA, CHSL, CGL, and MTS में ऐसे questions frequently पूछे जाते हैं। इस वीडियो में सीखिए सबसे fast shortcut trick.
Subscribe for more Quant tricks & aptitude shortcuts.

Of the three numbers whose average is 60, the first is one-fourth of the sum of the others. Find the first number. In this video, learn the fastest shortcut trick to solve average questions for SSC, Banking, Railway & all competitive exams.

Average Concept:

Perfect for:
SSC CGL / CHSL
Banking Exams
Railway Exams
NDA / CDS

Competitive Aptitude Preparation
Watch till the end for quick calculation tricks and smart methods by Krishna Sir.

The average age of three boys is 15 years. If the ratio of their ages is 3:5:7, what is the age of the oldest boy?

Learn this important Average + Ratio shortcut trick for SSC, Banking, Railway, CAT, CDS, and all competitive exams.

In this reel, Krishna Sir explains the fastest method to solve average age questions within
seconds.

👉 Best for:
SSC CGL
CHSL
Banking Exams
Railway Exams
MTS
NDA
CET
Competitive Aptitude Exams

📚 Formula Used:
Average = Total Sum ÷ Number of Terms
Total Age = 15 × 3 = 45
Ratio Sum = 3 + 5 + 7 = 15
1 Part = 45 ÷ 15 = 3
Oldest Boy = 7 × 3 = 21 Years
✅ Correct Answer = 21 Years

Find the average of first 70 multiples of 5 ?

👉 Best shortcut trick to solve Average questions in seconds.
👉 Useful for SSC, Banking, Railway, CAT, CDS, NDA and all competitive exams.
👉 Learn fast calculation tricks with easy concepts by Krishna Sir.

✅ Concept Used:
Average of AP = (First Term + Last Term) ÷ 2
First 70 multiples of 5:
5, 10, 15, ........, 350
Average = (5 + 350) ÷ 2 = 177.5

In this question, we solve a smart average-based problem पूछा गया है:

👉 If the average of 41 consecutive even numbers is 152, what will be the largest number ?

💡 Concept Used:
For consecutive numbers (even/odd), the average = middle number
So here:
Middle number = 152
Total numbers = 41 (odd count)
Largest number = 152 + (40/2 × 2) = 152 + 40 = 192

🔥 यह एक बहुत important shortcut है SSC, Banking, Railway exams के लिए!

The average of 5 consecutive integers starting with m is given as n. In this question, we need to find the average of 9 consecutive integers starting from (m + 2).

👉 Concept Used:

For consecutive integers, the average is always the middle term.
✔ 5 consecutive numbers → middle = 3rd term = m + 2 = n
✔ 9 consecutive numbers starting from (m + 2) → middle = 5th term = m + 6
Now, since m + 2 = n
👉 So, m + 6 = n + 4

✅ Final Answer: n + 4

🔥 ऐसे ही आसान tricks सीखने के लिए अभी जुड़ें: