4
Q:

# Find the Odd one out of the given series6, 15, 35, 77, 165, 221

 A) 221 B) 165 C) 35 D) 77

Explanation:

The terms of the series are products of two consecutive prime numbers i.e.

(2 x 3), (3 x 5), (5 x 7), (7 x 11),.....

So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.

Q:

What number should replace the question mark?

125,   138,   164,   ?,   255

 A) 189 B) 197 C) 200 D) 203

Explanation:

The given number series is 125,   138,   164,   ?,   255

125

125 + 13x1 = 138

138 + 13x2 = 164

164 + 13x3 = 203

203 + 13x4 = 255

Hence, the missing number in the series is 203.

0 22
Q:

Find the missing number in the given number series?

5 11 21 44 ? 175

 A) 86 B) 78 C) 94 D) 102

Explanation:

Here the given number series is 5  11  21  44  ?  175

Now the given series follows a pattern, that

x2 + 1, x2 - 1, x2 + 2, x2 - 2, x2 + 3, x2 - 3,...

Then the missing number is x2 - 2

= 44 x 2 - 2 = 88 - 2 = 86

Hence, the missing number in the number series is 86.

0 22
Q:

Find the Odd one out of the following Numbers?

 A) 3 B) 19 C) 67 D) 133

Explanation:

Here among the given numbers, 3, 19, 67 are prime numbers. And 133 is not a prime number.

Hence, the odd number of the given numbers is 133.

0 162
Q:

Find the odd man out of the number series?

18     37     76     155     314     635

 A) 37 B) 155 C) 314 D) 635

Explanation:

Given Number series is 18     37     76     155     314     635

follows a pattern that,

18

18 x 2 +1 = 37

37 x 2 +2 = 76

76 x 2 +3 = 155

155 x 2 +4 = 314

314 x 2 +5 = 633 not 635

Hence, the odd man is 635.

5 77
Q:

Please enter the Missing number: 4 8 14 22 ?

 A) 28 B) 32 C) 46 D) 36

Explanation:

Here the given series follows a pattern that,

2- 0 = 4

3- 1 = 8

4- 2 = 14

5- 3 = 22

6- 4 = 32

Hence, the missing number is 32

Method 2 ::

The difference between 4 and 8 is 4, the difference between 8 and 14 is 6, the difference between 14 and 22 is 8. So the next difference between 22 and the next number will be 10 since it follows (4,6,8,10 - add +2 each time)

Hence, 22 + 10 = 32 is the missing number.

4 126
Q:

Find the next number in the given number series?

0, 3, 8, 15, 24, ?

 A) 35 B) 37 C) 34 D) 36

Explanation:

Here the given number series is 0, 3, 8, 15, 24, ?

The next number in the given series can be found such a way that the number series follows a pattern,

2 107
Q:

Find the Missing number in the given number series?

5, 9, 15, 23, ?, 45

 A) 33 B) 29 C) 31 D) 35

Explanation:

The given series follows a pattern that,

+4, +6, +8, +10, +12...

5

5 + 4 = 9

9 + 6 = 15

15 + 8 = 23

23 + 10 = 33

33 + 12 = 45

Hence, the missing number in the series is 33.

1 85
Q:

Find the next number in the number series?

1, 4, 12, 32, ?

 A) 80 B) 100 C) 192 D) 169

Explanation:

Next number of the sequence 1, 4, 12, 32,...

1 = 2 x ${2}^{0}$

4 = 2 x ${2}^{1}$

12 = 3 x ${2}^{2}$

32 = 4 x ${2}^{3}$

80 = 5 x ${2}^{4}$.