Odd One Out Analysis
The question asks us to identify the number that does not follow the same pattern as the others from the given list. The list contains the numbers \(\text{231}\), \(\text{123}\), \(\text{312}\), and \(\text{124}\). We need to find the rule that applies to most numbers and see which one breaks it.
Number Pattern Identification
Let's examine the digits that make up each number:
- Option 1: \(\text{231}\) - Contains the digits 1, 2, and 3.
- Option 2: \(\text{123}\) - Contains the digits 1, 2, and 3.
- Option 3: \(\text{312}\) - Contains the digits 1, 2, and 3.
- Option 4: \(\text{124}\) - Contains the digits 1, 2, and 4.
We can observe a clear pattern here. The first three numbers (\(\text{231}\), \(\text{123}\), \(\text{312}\)) are all formed using exactly the same set of digits: {1, 2, 3}. They are different arrangements (permutations) of these three digits.
However, the fourth number, \(\text{124}\), uses a different set of digits: {1, 2, 4}. It includes the digit 4 instead of the digit 3.
Another way to see this pattern is by looking at the sum of the digits:
- \(\text{231}\): \(2 + 3 + 1 = 6\)
- \(\text{123}\): \(1 + 2 + 3 = 6\)
- \(\text{312}\): \(3 + 1 + 2 = 6\)
- \(\text{124}\): \(1 + 2 + 4 = 7\)
This confirms that \(\text{124}\) is different because its digits sum to 7, while the digits of the other numbers sum to 6.
Conclusion
Based on the analysis of the digits used and their sum, the number \(\text{124}\) is the odd one out because it does not consist of the digits 1, 2, and 3 like the other options.
Similar Questions
Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
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(NOTE: The odd one out is not based on the number of vowels or consonants in the word)
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Important Questions from Classification
Directions for the following 3 (three) items : consider the given information and answer the three items that follow.
A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order).
Further 1. Lecturer from Kanpur is specialized in Geography
2. Lecturer D is from Shillong
3. Lecturer C from Delhi is specialized in Sociology
4. Lecturer B is specialized in neither History nor Mathematics
5. Lecturer A who is specialized in Economics does not belong to Hyderabad
6. Lecturer F who is specialized in Commerce belongs to Srinagar
7. Lecturer G who is specialized in Statistics belongs to Chennai
Who is specialized in Geography?
A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order).
Further 1. Lecturer from Kanpur is specialized in Geography
2. Lecturer D is from Shillong
3. Lecturer C from Delhi is specialized in Sociology
4. Lecturer B is specialized in neither History nor Mathematics
5. Lecturer A who is specialized in Economics does not belong to Hyderabad
6. Lecturer F who is specialized in Commerce belongs to Srinagar
7. Lecturer G who is specialized in Statistics belongs to Chennai
To which city does the Lecturer specialized in Economics belong?
A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order).
Further 1. Lecturer from Kanpur is specialized in Geography
2. Lecturer D is from Shillong
3. Lecturer C from Delhi is specialized in Sociology
4. Lecturer B is specialized in neither History nor Mathematics
5. Lecturer A who is specialized in Economics does not belong to Hyderabad
6. Lecturer F who is specialized in Commerce belongs to Srinagar
7. Lecturer G who is specialized in Statistics belongs to Chennai
Who of the following belongs to Hyderabad?
In a school, there are five teachers A, B, C, D and E. A and B teach Hindi and English. C and B teach English and Geography. D and A teach Mathematics and Hindi. E and B teach History and French. Who teaches maximum numb, of subjects?
How many triangles are there in the given figure?
