1. Insert the missing number in the series 3, 15, 10, 50, 45, 225,?

2. Which term of the sequence 7, 10, 13,……is 151

3. What is the sum of all 3-digit natural numbers divisible by 52?

4. What will be the next set of numbers in the series? (2, 3), (3, 5), (5, 7), (7, 11), (11, 13), _______

5. The wrong number in the series: 1, 5, 29, 219, 3129

6. The next number of the sequence 2, 6, 12, 20, 30, 42, 56, _____ is

7. What is the value of 62 + 72 + ______ +152?

8. Find the missing number: 3, 12, 27, 48, 75, 108,?

9. What will come in place of the question mark in the following number series? 2, 5, 10, 17, 26, ?

10. In the following question, select the missing number from the given series. 60, -52, 44, -36, 28, ?

11. Check whether 143 is a term of the AP : 3, 7, 11, …..?

12. In the sequence of numbers 7, 9, 13, 19, 27, 36, 49 one number is wrong. The wrong number is

13. What should come in place of question mark (?) in the following number series? 0, ?, 3, 20, 115

14. The wrong number in the sequence 1, 8, 27, 84, 125, 216, 343 is

15. The odd element in the sequence 3, 7, 13, 21, 33, 43, 57, ___ is

16. Find out the missing number to complete the sequence 2, 6, 12, 20, 30, 42, 56, _____ is

17. The wrong number in the sequence 8, 13, 21, 32, 46, 62, 83, is

18. A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series 180, 90, 135, ?

19. Find the missing number in the sequence 2,5,10,17,_,37.

20. What should come in place of question mark in the following number series? 10, 14, 25, 55, 140, ͟?

21. A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. 4, 13, 40, 121, ?

22. Write the next two numbers 9/8, 9/4, 27/8, 9/2, ____, _____.