Practice Questions: Classification- 3 | Logical Reasoning for 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) 2345
(b) 3456
(c) 5467
(d) 5678
Ans: (c)
All other numbers contain four consecutive digits in order.
Hence, option C is correct.

Q2: Choose the number which is DIFFERENT from the rest?
(a) 21
(b) 69
(c) 81
(d) 83
Ans: (d)
Each of the numbers except 83 is divisible by 3.
Hence, option D is correct.

Q3: Choose the number which is DIFFERENT from the rest?
(a) 361
(b) 434
(c) 566
(d) 529
Ans: (c)
Each of the numbers except 566 is a perfect square.
Hence, option C is correct.

Q4: Choose the number which is DIFFERENT from the rest?
(a) 25631
(b) 33442
(c) 34424
(d) 52163
Ans: (b)
In all other numbers, the sum of the digits is 17.
Hence, option B is correct.

Q5: Choose the number which is DIFFERENT from the rest?
(a) 392
(b) 326
(c) 414
(d) 248
Ans: (a)
Except the first, all others are the product of the digits, which is a perfect square.
2nd option: 326 ⇒ 3 × 2 × 6 = 36 = 6² 
3rd option: 414 ⇒ 4 × 1 × 4 = 16 = 4² 
4th option: 248 ⇒ 2 × 4 × 8 = 64 = 8²
But
1st option: 392 ⇒ 3 × 9 × 2 = 54.
Hence, the first option is different.
Hence, option A is correct.

Q6: Choose the number which is DIFFERENT from the rest?
(a) 28
(b) 65
(c) 126
(d) 126
Ans: (a)
28 is the only number with all digits even.
Hence, option A is correct.

Q7: Choose the number which is DIFFERENT from the rest?
(a) 2468
(b) 2648
(c) 4826
(d) 6482
Ans: (a)
All other numbers contain the first four consecutive even numbers but not in proper order.
Hence, option A is correct.

Q8: Choose the number which is DIFFERENT from the rest?
(a) 369
(b) 462
(c) 761
(d) 862
Ans: (c)
761 is the only prime number in the group.
Hence, option C is correct.

Q9: Choose the number which is DIFFERENT from the rest?
(a) 9611
(b) 7324
(c) 2690
(d) 1754
Ans: (b)
From the options, we get:
1st option: 9611 ⇒ 9 + 6 + 1 + 1 = 17
3rd option: 2690 ⇒ 2 + 6 + 9 + 0 = 17
4th option: 1754 ⇒ 1 + 7 + 5 + 4 = 17
But 2nd option: 7324 ⇒ 7 + 3 + 2 + 4 = 16.
Hence, the second option is different.
Hence, option B is correct.

Q10: Choose the number which is DIFFERENT from the rest?
(a) 5788
(b) 5878
(c) 6482
(d) 9748
Ans: (c)
From the options, we get:
1st option: 5788 ⇒ 5 + 7 + 8 + 8 = 28
2nd option: 5878 ⇒ 5 + 8 + 7 + 8 = 28
4th option: 9748 ⇒ 9 + 7 + 4 + 8 = 28
But 3rd option: 6482 ⇒ 6 + 4 + 8 + 2 = 20.
Hence, the third option is different.
Hence, option C is correct.