Question 1

In the following sum, “?” stands for which digit ? 8 + ?8 + 28 + 83 + 8? = 2?8

Accepted Answer

By trial and error method from the given options, '1' satisfies the above given equation.

Question 2

Find the next number in the given number series? 6, 6, 12, 36, 144, 720, ?

Accepted Answer

The given series is 6, 6, 12, 36, 144, 720, ? 6 6 x 1 = 6 6 x 2 = 12 12 x 3 = 36 36 x 4 = 144 144 x 5 = 720 720 x 6 = 4320 Hence, the next number in the given number series is 4320.

Question 3

Find the next number in the given number series? 8, 11, 19, 23, 32, ?

Accepted Answer

The given number series is 8, 11, 19, 23, 32, ? It follows a pattern that 8 + 11 = 19 11 + 12 = 23 19 + 13 = 32 23 + 14 = 37 32 + 15 = 47 .... Hence, the next number in the given series = 37.

Question 4

Choose the correct alternative that will continue the same pattern and replace 'x' in the series 6834,6151,5536,4983,x

Accepted Answer

Each term in the series is obtained by subtracting from the preceding term the number formed by the first three digits of preceding term So,missing term is 4983-498=4485

Question 5

Find the wrong number in the following series? 1500, 1475, 1448, 1419, 1389, 1355, 1320

Accepted Answer

Take a look at the below sereies : 1500 - 25 = 1475 1475 - 27 = 1448 1448 - 29 = 1419 1419 - 31 = 1388 1388 - 33 = 1355 1355 - 35 = 1320 It clearly shows 1389 is Wrong Number

Question 6

What is the number that should come in the place of question mark ? 1050 420 168 67.2 ?

Accepted Answer

Given series follows the rule of 1050/2.5 = 420 420/2.5 = 168 168/2.5 = 67.2 so 67.2/2.5 = 26.88

Question 7

Find the next number in the series 404, 415, 402, 413, 400, ?

Accepted Answer

The given series 404, 415, 402, 413, 400, ? follows a pattern that, 404 404 + 11 = 415 415 - 13 = 402 402 + 11 = 413 413 - 13 = 400 400 + 11 = 411 Hence the next number in the given number series is 411.

Question 8

Find the next number in the given number sequence? 4, 15, 37, 81, ?

Accepted Answer

The given number series follows a pattern that, 4, 15, 37, 81, ? 4 4 + 11 = 15 15 + 22 = 37 37 + 44 = 81 81 + 88 = 169 Hence, the next number in the sequence is 169.

Question 9

Find the next number in the given number series 1, 3, 10, 41, 206, ?

Accepted Answer

The given number series is 1, 3, 10, 41, 206, ? It follows a pattern that, 1 1 x 2 + 1 = 3 3 x 3 + 1 = 10 10 x 4 + 1 = 41 41 x 5 + 1 = 206 206 x 6 + 1 = 1237 Hence, the next number in the given number series is 1237.

Question 10

What would be the next number in the sequence 52, 56, 48, 64, 32, ?

Accepted Answer

The given number series is 52, 56, 48, 64, 32, … It follows a pattern that, 52 52 + 4 = 56 56 - 8 = 48 48 + 16 = 64 64 - 32 = 32 32 + 64 = 96 Therefore, the required next number in the given number series is 96.

Question 11

Choose the correct alternative that will continue the same pattern and replace 'x' in series 1.5,1.55,1.65,1.8,x

Accepted Answer

The pattern is +0.05,+0.1,+0.15, . . . . so missing term =1.8+0.20=2.0

Question 12

Choose the correct alternative that will continue the same pattern and replace 'x' in series 1,2,5,10,25,50,x,250

Accepted Answer

The pattern is *2,*5/2,*2,*5/2,*2, . . . . . So missing term is 50*(5/2)=125

Question 13

Which Number would come in place of the underline mark in the series. 3, 9, 21, ___ , 93

Accepted Answer

First difference is 6 and second is 12. But if we take third as 18, then fourth difference will be 24. Then 93 can not be the last term. So we have to take the difference as 6, 12, 24 and 48. So Answer is 21+24 = 45

Question 14

bc _ b _ c _ b _ ccb

Accepted Answer

Here 'bccb' repeated 3 times. b c c b | b c c b | b c c b

Question 15

Find the next number in the series 265, 269, 278, 284, ?

Accepted Answer

The pattern in the given series is +4, +9, +16, +25, ... i.e. 2 2 , 3 2 , 4 2 , 5 2 . . . The next number is 284+25 = 309.

Question 16

Find the next number in the given number sequence? 9, 19, 21, 43, 45, ...

Accepted Answer

The given number series 9, 19, 21, 43, 45, ... follows a pattern that ALternately (x 2 + 1) and (x 1 + 2) 9 9 x 2 + 1 = 19 19 x 1 + 2 = 21 21 x 2 + 1 = 43 43 x 1 + 2 = 45 45 x 2 + 1 = 91 Hence, the next number in the given sequence is 91.

Question 17

Next number in the number sequence is 22, 11, 33, 16.5, 49.5, ?

Accepted Answer

The given number series is 22, 11, 33, 16.5, 49.5, ? 22 22 / 2 = 11 11 x 3 = 33 33 / 2 = 16.5 16.5 x 3 = 49.5 49.5 / 2 = 24.75 Hence, the next number series is 24.75.

Question 18

Complete the number series? 11, 12.2, 14.6, 18.2, ?

Accepted Answer

The given number series 11, 12.2, 14.6, 18.2, ? 11 11 + 1.2 = 12.2 12.2 + 2.4 = 14.6 14.6 + 3.6 = 18.2 18.2 + 4.8 = 23 Hence, the next number in the given number series is 23.

Question 19

Find the next number in the given number series? 10, 6, 8, 15, ?

Accepted Answer

The given number series is 10, 6, 8, 15, ? 10 10 x 0.5 + 1 = 6 6 x 1 + 2 = 8 8 x 1.5 + 3 = 15 15 x 2 + 4 = 34 Hence, the next number in the given series is 34.

Question 20

Find out the wrong term in the series 83,92,85,90,85,88

Accepted Answer

The correct pattern is +9,-7,+5,-3,+1 So,85 is wrong term and must be replaced by 90-3=87

Number Series Questions