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Practice Questions: Classification- 7 - CLAT PDF Download

Directions: In this type of questions, certain numbers are given, out of which all except one share some common property and hence are alike, while one is different and this number is to be chosen as the answer.

Q1: Choose the number which is DIFFERENT from the rest?
(a) 7851
(b) 6432
(c) 5789
(d) 1325

Ans: (b)
Each of the numbers except 6432 is an odd number.
Hence, option B is correct.

Q2: Choose the number which is DIFFERENT from the rest?
(a) 372164
(b) 376821
(c) 318951
(d) 319446

Ans: (a)
Sum of the digits in each other number is 27.
Hence, option A is correct.

Q3: Choose the number which is DIFFERENT from the rest?
(a) 121
(b) 137
(c) 153
(d) 177

Ans: (a)
121 is the only perfect square number in the group.
Hence, option A is correct.

Q4: Choose the number which is DIFFERENT from the rest?
(a) 27
(b) 64
(c) 125
(d) 144

Ans: (d)
Each of the numbers except 144 is a perfect cube.
Hence, option D is correct.

Q5: Choose the number which is DIFFERENT from the rest?
(a) 11
(b) 13
(c) 15
(d) 17

Ans: (c)
Each of the numbers except 15 is a prime number.
Hence, option C is correct.

Q6: Choose the number which is DIFFERENT from the rest?
(a) 1236
(b) 2346
(c) 4566
(d) 5686

Ans: (d)
In all other numbers, the first three digits are consecutive numerals.
Hence, option D is correct.

Q7: Choose the number which is DIFFERENT from the rest?
(a) 10
(b) 11
(c) 15
(d) 16

Ans: (b)
11 is the only prime number in the group.
Hence, option B is correct.

Q8: Choose the number which is DIFFERENT from the rest?
(a) 7
(b) 15
(c) 31
(d) 57

Ans: (d)
All other numbers can be expressed as a power of 2 minus one. Thus, 7 = 23 – 1, 15 = 24 – 1, 31 = 25 – 1.
Hence, option D is correct.

Q9: Choose the number which is DIFFERENT from the rest?
(a) 144
(b) 168
(c) 196
(d) 256

Ans: (b)
Each of the numbers except 168 is a perfect square.
Hence, option B is correct.

Q10: Choose the number which is DIFFERENT from the rest?
(a) 2
(b) 16
(c) 56
(d) 128

Ans: (c)
Each of the numbers except 56 can be expressed in terms of powers of 2.
Hence, option C is correct.

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