JNSY-1

1.1 ODD MAN OUT

·                     Odd Man Out and Series - Pick Wrong No.

·                     Odd Man Out and Series - Missing No.

·                     Odd Man Out and Series - Find Wrong No.

1.1.1 Find out the wrong number in the given sequence of numbers.

1.  582, 605, 588, 611, 634, 617, 600 A. 634 B. 611 C. 605 D. 600 Answer: Option A Explanation: Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.

2.	22, 33, 66, 99, 121, 279, 594
	A. 33 B. 121 C. 279 D. 594 Answer: Option C Explanation: Each of the number except 279 is a multiple of 11.

3.	8, 13, 21, 32, 47, 63, 83
	A. 47 B. 63 C. 32 D. 83 Answer: Option A Explanation: Go on adding 5, 8, 11, 14, 17, 20. So, the number 47 is wrong and must be replaced by 46.

4.	1, 8, 27, 64, 124, 216, 343
	A. 8 B. 27 C. 64 D. 124 Answer: Option D Explanation: The numbers are 13, 23, 33, 43 etc. So, 124 is wrong; it must have been 53 i.e., 125.

5.	1, 2, 6, 15, 31, 56, 91
	A. 31 B. 91 C. 56 D. 15 Answer: Option B Explanation: 1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92 Last number of given series must be 92 not 91.

1.1.2   Insert the missing number.

1.	16, 33, 65, 131, 261, (....)
	A. 523 B. 521 C. 613 D. 721 Answer: Option A Explanation: Each number is twice the preceding one with 1 added or subtracted alternatively. So, the next number is (2 x 261 + 1) = 523.

2.	10, 5, 13, 10, 16, 20, 19, (....)
	A. 22 B. 40 C. 38 D. 23 Answer: Option B Explanation: There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.

3.	1, 4, 9, 16, 25, 36, 49, (....)
	A. 54 B. 56 C. 64 D. 81 Answer: Option C Explanation: Numbers are 12, 22, 32, 42, 52, 62, 72. So, the next number is 82 = 64

4.  2, 4, 12, 48, 240, (....) A. 960 B. 1440 C. 1080 D. 1920 Answer: Option B Explanation: Go on multiplying the given numbers by 2, 3, 4, 5, 6. So, the correct next number is 1440.

5.	8, 7, 11, 12, 14, 17, 17, 22, (....)
	A. 27 B. 20 C. 22 D. 24 Answer: Option B Explanation: There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.

1.1.3 Find out the wrong number in the series.

1.	7, 8, 18, 57, 228, 1165, 6996
	A. 8 B. 18 C. 57 D. 228 E. 1165 Answer: Option D Explanation: Let the given numbers be A, B, C, D, E, F, G. Then, A, A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required numbers. Clearly, 228 is wrong

2.	1, 1, 2, 6, 24, 96, 720
	A. 720 B. 96 C. 24 D. 6 E. 2 Answer: Option B Explanation: Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number. So, 96 is wrong.

3.	196, 169, 144, 121, 100, 80, 64
	A. 169 B. 144 C. 121 D. 100 E. 80 Answer: Option E Explanation: Numbers must be (14)2, (13)2, (12)2, (11)2, (10)2, (9)2, (8)2. So, 80 is wrong.

4.	445, 221, 109, 46, 25, 11, 4
	A. 221 B. 109 C. 46 D. 25 E. 11 Answer: Option C Explanation: Go on subtracting 3 and dividing the result by 2 to obtain the next number. Clearly, 46 is wrong.

5.	190, 166, 145, 128, 112, 100, 91
	A. 100 B. 166 C. 145 D. 128 E. 112 Answer: Option D Explanation: Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number. 190 - 24 = 166 166 - 21 = 145 145 - 18 = 127 [Here, 128 is placed instead of 127] 127 - 15 = 112 112 - 12 = 100 ... and so on. Therefore, 128 is wrong.