SSC CHSL Topic Wise Study Material – General Intelligence – Symbolic/ Number Classification
In this chapter, we deal with the questions in which the given word/alphabet/number follow the same relationship except one. The particular word/alphabet/number has to be assort out. Questions asked in this chapter has four options in them three belongs to a group by nature of words/alphabet/number and one belongs to another group. The option which seems different from the rest of the option has to be chosen as the answer. For solving these type of question, candidate has to aware about the mathematical activities and English alphabets also.
The main motive of asking the symbolic (alphabetic) and number classification questions is to judge the ability of a candidate with reference to the mathematical operations/rules and also the alphabetical series.
In number classification, there is a similarity among the numbers or groups of numbers. The number classification is based on similarities like
- Prime number
- Square and square roots of a number
- Cube and cube roots of a number
- Even and odd number
- Divisibility test of a number etc.
Example: Find the odd one out.
(a) 72-43 (b) 68-40 (c) 85-57 (d) 55-27
Answer: (a) Except in the number pair 72-43, in all others the difference between the twjp numbers is 28.
68 -40 = 28 85-57 = 28 55-27 = 28 But, 72 – 43 = 29, so 72—43 is odd one out.
In alphabet classification, there is a similarity or pattern among the alphabets in the group. The candidate has to identify the pattern and select the one which does not follow the common pattern in the group. The relationship among the alphabets is based on the following.
- Position of alphabets
- Vowel and consonant
- Reverse order of alphabets
- Addition and multiplication of position etc.
Example: Select the one which is different from the other three responses.
1. Select the odd word/letters/number/ number pair from the given alternatives. SSC (10+2) 2017
Directions (Q. Nos. 2-11) Find the odd letter/ number from the given alternatives.
2. SSC (10 + 2) 2015
Answer: (b) Except 17, all others are composite numbers.
3. SSC (10 + 2) 2014
(a) 2, 3
(b) 20, 21
(c) 9, 10
(d) 24, 25
Answer: (a) Except 2, 3, all other groups both digits are divisible, while in 2, 3 both digits are prime.
4. SSC (10 + 2) 2014
Answer: (d) Only 64 is a square number
5. SSC (10 + 2) 2014
6. SSC (10 + 2) 2014
Answer: (a) Only group DCEB has consecutive letters of alphabetical series.
7. SSC (10 + 2) 2014
8. SSC (10 + 2) 2014
9. SSC (10 + 2) 2013
10. SSC (10 + 2) 2013
(a) 5 – 21
(b) 29 – 45
(c) 48 – 68
(d) 71 – 87
11. SSC (10 + 2) 2013
(a) 8 – 15
(b) 25 – 36
(c) 49 – 64
(d) 81 – 100
Answer: (a) Except 8-15, in all the options, both of the numbers are the square of any natural number.
Directions (Q. NOS. 1-8) In each of the following questions, three of the given four are alike in a certain way and form a group. Which is the one that does not belong to that group in the following questions?
Directions (Q. Nos. 9-13) In each of the following questions, some letters or groups of letters are given all of which except one, share a common similarity while one is different. Choose the odd one out.
Directions (Q. Nos. 14-21) In each of the following questions, find out the pair of numbers that do not belong to the group for each of common property.
Hints and Solutions