Question 1

Find out the wrong term in the following number series. 4, 16, 37, 58, 81.

Accepted Answer

The series follows the following pattern. 4 16 = 4 2 37 = 1 2 + 6 2 58 = 3 2 + 7 2 81 ≠ 5 2 + 8 2 . Here every number is based on the digits of previous number. Hence, 81 is the wrong number in the given series.

Question 2

Find the odd one out of the floowing number series? 270, 261, 279, 252, 289, 243

Accepted Answer

Here the given number series is 270, 261, 279, 252, 289, 243 270 - 9 = 261 261 + 18 = 279 279 - 27 = 252 252 + 36 = 288 (not equals to 289) 288 - 45 = 243 Hence, the odd number in the given number series is 289.

Question 3

Find the wrong number in the given number series? 10, 21, 54, 109, 189

Accepted Answer

The given number series is 10, 21, 54, 109, 189 The series follows a pattern that 10 + 11 = 21 21 + 33 = 54 54 + 55 = 109 109 + 77 = 186 Hence the wrong number in the given number series is 189.

Question 4

Odd man out of the series - 15, 19, 27, 38, 55, 75?

Accepted Answer

The given series is 15, 19, 27, 38, 55, 75 15 15 + 4 = 19 19 + 8 = 27 27 + 12 = 39 39 + 16 = 55 55 + 20 = 75 Hence, the odd number in the given series is 38.

Question 5

Find the next number in the given series 0.25, 8, 128, 1024, ?

Accepted Answer

Here given series follows a pattern that 0.25, 8, 128, 1024, ? 0.25 x 32 = 8 8 x 16 = 128 128 x 8 = 1024 1024 x 4 = 4096

Question 6

7, 11, 19, 35, ? Find the next number in the given number series?

Accepted Answer

Here the given series 7, 11, 19, 35, ? follows a pattern that (x 2 - 3) i.e, 7 7 x 2 - 3 = 11 11 x 2 - 3 = 19 19 x 2 - 3 = 35 35 x 2 - 3 = 67 67 x 2 - 3 = 131 Hence the next number in the given number series is 67.

Question 7

Find the missing number? 5 19 49 101 181 295 ?

Accepted Answer

Given number series is 5 19 49 101 181 295 ? Here the series follows pattern that 5 19 49 101 181 295 ? 14 30 52 80 114 (difference) 16 22 28 34 (difference) 6 6 6 (Common difference) Therefore, the missing number in the series is ? = 295 + 115 + 34 + 6 = 449.

Question 8

Find the missing number in the given number series? 2676, 445, ?, 21,6, 2, 1

Accepted Answer

The given number series 2676, 445, ?, 21,6, 2, 1 follows a pattern that, From right side, 1 1 x 1 + 1 = 2 2 x 2 + 2 = 6 6 x 3 + 3 = 21 21 x 4 + 4 = 88 88 x 5 + 5 = 445 445 x 6 + 6 = 2676 Hence the missing number in the given number series is 88.

Question 9

Find the missing number in the given number series? 514, 470, ?, 415, 404

Accepted Answer

Given number series is 514 470 ? 415 404 Here the pattern it follows is 514 514 - 44 = 470 470 - 33 = 437 437 - 22 = 415 415 - 11 = 404 Hence, the missing number in the given number series is 437.

Question 10

Find the Odd One Out? 3, 4, 14, 48, 576, 27648

Accepted Answer

Given Number series is : 3 4 14 48 576 27648 It follows a pattern that, 3 4 4 x 3 = 12 but not 14 12 x 4 = 48 48 x 12 = 576 576 x 48 = 27648 Hence, the odd one in the given Number Series is 14.

Question 11

Find the odd one out? 6, 3, 3, 4.5, 10

Accepted Answer

Here the given number series is 6, 3, 3, 4.5, 10 The odd one in the given series is 10 The pattern it follows is 6 6 x 0.5 = 3 3 x 1 = 3 3 x 1.5 = 4.5 4.5 x 2 = 9 Hence, the odd number is 10.

Question 12

Find the odd man out in the following number series? 5, 4, 9, 32, 273

Accepted Answer

The given number series follows 5, 4, 9, 32, 308 pattern that 5 5 x 1 - 1 = 4 4 x 3 - 3 = 9 9 x 5 - 5 = 40 (not equals to 32) 40 x 7 - 7 = 273 Hence, the odd man in the given number series is 32.

Question 13

Find the odd one out of the following number series? 9 5 6 14 56 488

Accepted Answer

The given number series follows a pattern that, 9 9 x 0.5 + 0.5 = 5 5 x 1 + 1 = 6 6 x 2 + 2 = 14 14 x 4 + 4 = 60 (not equals to 56) 60 x 8 + 8 = 488. Hence, the odd one in the given number series is 56.

Question 14

Find the next number in the following number series? 410, 409, 413, 404, ?

Accepted Answer

The given number series 410, 409, 413, 404, ? , follows a pattern that 410 410 - 1 3 = 409 409 + 2 2 = 413 413 - 3 3 = 404 404 + 4 2 = 420 Hence, the next number in the given series is 420.

Question 15

Find the odd one out of the following number series? 56, 64, 48, 90, 16, 144

Accepted Answer

The given number series follows a pattern that, 56 56 + 8 = 64 64 - 16 = 48 48 + 32 = 80 (Not equal to 90) 80 - 64 = 16 16 + 128 = 144 Hence, the odd number in the given number series is 90.

Question 16

Find the next number in the number series? 6, 6, 9, 18, 45, ?

Accepted Answer

The given number series is 6, 6, 9, 18, 45, ? Here the series follows a pattern that, 6 6 x 1 = 6 6 x 1.5 = 9 9 x 2 = 18 18 x 2.5 = 45 45 x 3 = 135 Hence, the next number in the given number series is 135.

Question 17

Pick an odd man in the given number series? 4 12 38 87 198

Accepted Answer

The given series follows a pattern that, 4 + 3 2 = 4 + 9 = 13 13 + 5 2 = 13 + 25 = 38 38 + 7 2 = 38 + 49 = 87 87 + 9 2 = 87 + 81 = 198 Hence, the odd man in the given number series is 12.

Question 18

Pick the odd man out of the folowing number sequence? 123 112 133 112 143

Accepted Answer

Here the given series is 123 112 133 112 143 It follows a pattern that, 123 123 - 11 = 112 112 + 21 = 133 133 - 31 = 102 (not 122) 102 + 41 = 143 Hence, the odd man in the given number sequence is 122 instead of 102.

Question 19

Find the odd man out? 12, 48, 168, 502, 1260

Accepted Answer

The given series is 12, 48, 168, 502, 1260 12 12 x 4 = 48 48 x 3.5 = 168 168 x 3 = 504 504 x 2.5 = 1260 Hence, the odd man out in the given series is 502.

Question 20

Mark the odd man out in the given number series 24.3, 23.1, 20.7, 17.1, 12.4

Accepted Answer

The given series 24.3, 23.1, 20.7, 17.1, 12.4 follows a pattern that 24.3 24.3 - 1.2 = 23.1 23.1 - 2.4 = 20.7 20.7 - 3.6 = 17.1 17.1 - 4.8 = 12.3 not 12.4 Hence, the odd man or odd number in the given series is 12.4

Odd Man Out and Series Questions