Defence Exam > Defence Questions > Consider two-digit numbers which remain the s...
Start Learning for Free
Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?
- a)33
- b)44
- c)55
- d)66
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Consider two-digit numbers which remain the same when the digits inter...
All such 2 digit numbers are 11,22,33,44……. upto 99
Forms an AP
So sum = n/2(a+l)
= 9/2(11+99)
Average = sum/9 = ½(11+99) = 55
Forms an AP
So sum = n/2(a+l)
= 9/2(11+99)
Average = sum/9 = ½(11+99) = 55
Most Upvoted Answer
Consider two-digit numbers which remain the same when the digits inter...
To find the average of two-digit numbers that remain the same when the digits interchange their positions, we need to first list down all the possible numbers that satisfy this condition.
Two-digit numbers have a tens digit and a units digit. For the number to remain the same when the digits interchange their positions, the tens digit and the units digit should be the same.
Let's list down the numbers that satisfy this condition:
11 (tens digit = 1, units digit = 1)
22 (tens digit = 2, units digit = 2)
33 (tens digit = 3, units digit = 3)
44 (tens digit = 4, units digit = 4)
55 (tens digit = 5, units digit = 5)
66 (tens digit = 6, units digit = 6)
77 (tens digit = 7, units digit = 7)
88 (tens digit = 8, units digit = 8)
99 (tens digit = 9, units digit = 9)
There are 9 numbers in total that satisfy the given condition.
Now, to find the average of these numbers, we add them up and divide the sum by the total number of numbers.
Sum of all the numbers = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99 = 495
Total number of numbers = 9
Average = Sum of all the numbers / Total number of numbers = 495 / 9 = 55
Therefore, the average of two-digit numbers that remain the same when the digits interchange their positions is 55.
Hence, the correct answer is option C) 55.
Two-digit numbers have a tens digit and a units digit. For the number to remain the same when the digits interchange their positions, the tens digit and the units digit should be the same.
Let's list down the numbers that satisfy this condition:
11 (tens digit = 1, units digit = 1)
22 (tens digit = 2, units digit = 2)
33 (tens digit = 3, units digit = 3)
44 (tens digit = 4, units digit = 4)
55 (tens digit = 5, units digit = 5)
66 (tens digit = 6, units digit = 6)
77 (tens digit = 7, units digit = 7)
88 (tens digit = 8, units digit = 8)
99 (tens digit = 9, units digit = 9)
There are 9 numbers in total that satisfy the given condition.
Now, to find the average of these numbers, we add them up and divide the sum by the total number of numbers.
Sum of all the numbers = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99 = 495
Total number of numbers = 9
Average = Sum of all the numbers / Total number of numbers = 495 / 9 = 55
Therefore, the average of two-digit numbers that remain the same when the digits interchange their positions is 55.
Hence, the correct answer is option C) 55.
|
Explore Courses for Defence exam
|
|
Similar Defence Doubts
Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer?
Question Description
Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer?.
Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer?.
Solutions for Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Defence.
Download more important topics, notes, lectures and mock test series for Defence Exam by signing up for free.
Here you can find the meaning of Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?a)33b)44c)55d)66Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Defence tests.
|
|
Explore Courses for Defence exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup