Number Series-1

Number Series-1

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Question 1 of 12

1. Question
Which of the following is the next number in the series given below

1, 3, 7, 11, 21, 39, 71, ?
- 120
- 121
- 131
- 132
Correct

Incorrect

Hint

Sum of three terms gives you the next term in this series.

1+3+7 =11 + 7+3 = 21 and so on
Question 2 of 12

2. Question
12, 17, 67, 152, 182 , ?
- 231
- 241
- 251
- 261
Correct

Incorrect

Hint

182 + 1^2 + 8^2+ 2^2 = 151
Question 3 of 12

3. Question
3, 13, 31, 57, 91, 133, ?
- 142
- 146
- 151
- 183
Correct

Incorrect

Hint

1 x2 +1 = 3 ; 3 x 4 +1 = 13 ; 5x 6 +1 = 31 ; 7 x 8 +1 = 57 ; 9 x 10 + 1 = 91

Similarly the last number must be. 12 x 13 +1 = 157
Question 4 of 12

4. Question
11, 15, 24, 49, 98, 219, ?
- 384
- 388
- 391
- 398
Correct

Incorrect

Hint

11 + 2^2 = 15 + 3^2 = 24 + 5^2 = 49 + 7^2 = 98 + 11^2 = 219 + 13^2 = 388
Question 5 of 12

5. Question
1, 2, 4, 10, 34, 154, ?
- 874
- 864
- 854
- 844
Correct

Incorrect

Hint

1 + 1! = 2 + 2! = 4 + 3! = 10 + 4! = 34 +5! = 154 + 6! = 874
Question 6 of 12

6. Question
31, 62, 93, 25, 56, 87, ?
- 95
- 116
- 19
- 401
Correct

Incorrect

Hint

The series is multiples of 13 written inverted.

13 is written as 31, 26 is written as 62, 39 is written as 93, 52 is written as 25 and so on.
Question 7 of 12

7. Question
1, 10000, 10, 1111 , 11, 1110, 100,1101 , 101,1100 , 110, 1011, ? ,
- 111
- 1000
- 1001
- 101
Correct

Incorrect

Hint

There are two series – the alternate series starting from the first term is in binary – so this series contains decimal numbers 1,2,3 etc written in binary . The other series starts with the 2nd term and contains decimal numbers 16, 15, 14 etc written in base 3
Question 8 of 12

8. Question
0, 6, 24, 60, 120, 210 ?
- 336
- 350
- 326
- 222
Correct

Incorrect

Hint

1^3 -1 = 0

2^3-2 = 6

3^3 -3 = 24 and so on the last term which has to be found shall be.

7^3-7 = 336
Question 9 of 12

9. Question
1, 2, 6, 21, 88, 445 ?
- 2170
- 2225
- 2666
- 2676
Correct

Incorrect

Hint

1 x 1 +1 = 2. x 2 +2 = 6 x 3 +3 = 21 x4 +4 = 88 x 5 +5 = 445 x 6 +6 = 2676
Question 10 of 12

10. Question
2678, 672, 84, 32, ?
- 5
- 6
- 7
- 9
Correct

Incorrect

Hint

2 x 6 x 7 x 8 = 672.

6 x 7 x 2 = 84

8 x 4 = 32 so the next number should be 3 x 2 =6
Question 11 of 12

11. Question
2160, 360, 72, 18, 6 ?
- 1
- 2
- 3
- 4
Correct

Incorrect

Hint

This first number is divided by 6 to get the 2nd number. The 2nd number is divided by 5 to get the third number. This third number is divided by 4 to get the fourth number and so on. The last number must be divided by 2 to get the answer as 3
Question 12 of 12

12. Question
3, 30, 150, 500, 1250, 2500, ?
- 5000
- 4545.45
- 4166.67
- 4800
Correct

Incorrect

Hint

This first number is divided by 0.1 to get 30, the second number is divided by 0.2 to get the next number – 150, the third number is divided by 0.3 to get the 500 and so on. The last number 2500 is divided by 0.6 to get 4166.67