Number System Practice Set 1st

Here I am presenting the first practice set of Number System Questions on the special demand of one of our sincere visitor, Ram Gopal. This practice set contains 15 Questions of the same pattern as we had discussed on this blog in our previous posts related to this topic. I hope that you will be able solve these questions, in case any problem you may ask for help by sending the “solution required for question no......” in comment or through forum.

Q1. The set of counting numbers along with zero is called the set of

(a) Natural numbers          (b) Decimals          (c) Whole numbers        (d) None of these. 

Q2. The set of numbers {1, 2, 3, 4,.........} is called the set of

(a) Whole numbers       (b) Natural numbers      (c) Integers             (d) None of these.

Q3. The number which is not a natural number but a whole number is  

(a) a fraction            (b) 0            (c) a prime number        (d) 1

Q4. The sum of successor and predecessor of a whole number is equal to one more than the number. Then the number is  

(a) Any  natural number     (b) 1         (c) 2           (d) No such number 

Q5. The sum of three odd natural numbers multiplied by the sum of two even natural numbers is always

(a) An even natural number      (b) A multiple of 9      (c) Odd natural number   

(d) None of these 

Q6. Which of the following is always odd?

(a) Sum of two odd numbers      (b) Product of two odd numbers    

 (c) Difference of two odd numbers         (d) Nine of these 

Q7. The sum of first 100 natural numbers is

(a) 10100           (b) 3750         (c) 5050           (d) 15050 

Q8. The sum of first 50 even natural numbers is

(a) 1275           (b) 2550         (c) 1875           (d) 5100   

       

Q9. The sum of first 27 odd natural numbers is

(a) 756          (b) 378         (c) 729           (d) 780      

     

Q10. If consecutive whole numbers from 1 onwards are written one after another to the right of 1, the digit at the 31^st place is

(a) 0            (b) 2          (c) 1            (d) 3

Q11. The sum of the smallest one – digit natural number and the largest two – digit whole number is

(a) 101                (b) 99            (c) 2              (d) 100         (e) None of these

Q12. The difference between the largest 4 – digit natural number and the smallest 3 – digit whole number is 

(a) 9989             (b) 8999         (c) 9899        (d) 9889         (e) None of these 

Q13. If x is a natural number then x ÷ 0 is

(a) 0            (b) meaningless        (c) 1         (d) None of these 

Q14. A number which is a natural number but not a whole number is

(a) 1           (b) 0            (c) All negative numbers             (d) No such number 

Q15. The only whole number with a successor but not a predecessor is

(a) 0          (b) 1            (c) No such number                       (d) None of these.

Hope you will be able to solve these questions by your own. Visitor’s are warm heartedly welcomed with their related problems and queries. The solution of these questions (practice set) will be posted soon on this blog. More Conceptual enjoyment will be continued for you soon, just keep visiting this blog regularly and writing me your related queries through comment or forum.

Best of Luck for Exams. To be continued soon........................