Tuesday, 2 June 2015

SSC CGL 2015:'- Mathematics (Number System)


1. What is two-third of half of 369?
1)  123                  
2) 246                   
3) 246              
4) 271

2.  A boy was asked to multiply a certain number by 50. He multiplied it by 30 and got his answer less than the correct one by 400. The number to be multiplied was:
1) 10                       
2) 20                        
3) 30                       
4) 40

3.  Of a number exceeds  of the same number by 10. The number is:
1) 125                     
2)150                      
3)175                      
4)200

4. A boy was asked to find the value of  of a sum of money. Instead of multiplying the sum by  he divided it by   and then his answer exceeded by Rs. 55. Find the correct answer?
1) Rs. 9              
2) Rs. 24       
3) Rs. 64               
4) Rs. 1,320

5.  The sum of three consecutive odd natural numbers each divisible by 3 is 72. What is the largest among them?
1) 21                       
2) 24                       
3) 27                        
4) 36

6. By which smallest number should 5808 be multiplied so that it becomes a perfect square?
1) 2                          
2) 7                         
3)11                        
4)3



7. Two numbers differ by 5. If their product is 336, the sum of the two numbers is:
1) 21                       
2) 28                
3) 37                 
4) 51

8. An 85m long rod is divided into two parts. If one part is  of the other part, then the longer part (in metres) is:
1) 34                       
2) 56                  
3) 85                
4) 51


9. If we write 45 as sum of four numbers so that when 2 is added to first number, 2 subtracted from second number, third multiplied by 2 and fourth divided by 2, we get the same result, then the four numbers are:
1) 1, 8, 15, 21                                       
2) 8, 12, 5, 30              
3) 8, 12, 10, 15                                    
4) 2, 12, 5, 26

10. If 3 times a number exceeds its  by 60, then what is the number?
1) 25                       
2) 35                        
3) 45                
4) 60

11. The sum of three consecutive odd natural numbers is 147. Then, the middle number is:
1) 47                        
2) 48                        
3) 49                
4) 51

12. A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?
1) 6                           
2) 3.5                       
3) 8               
4) None of these

13. A number when divided by 899 gives a remainder 63. If the same number is divided by 2, the remainder will be:
1) 10                       
2) 5                          
3) 4                          
4) 2
  
14. The sum of the first 20 odd natural numbers is equal to:
1) 210                     
2) 300                      
3) 400                      
4) 420

15. The sum of all natural numbers from 75 to 97 is:
1) 1598                
2)1798                 
3)1958                
4)1978

16. 12345679x72 is equal to:
1) 88888888                                         
2) 999999998                 
3) 888888888                                               
4) 898989898

17. A six digit number is formed by repeating a three digit number; for example, 256, 256 or 678, 678 etc. any number of this form is always exactly divisible by:
1) 7 only             
2)11 only             
3) 13 only         
4)1001


18. The smallest number to be added to 1000, so that 45 divide the sum exactly, is:
1) 35                       
2) 80                        
3) 20                        
4) 10

19. The sum of all natural numbers between 100and 200 which are multiples of 3 are:
1) 5000                 
2) 4950                 
3) 4980                
4) 4900

20. 1008 divided by which single digit number gives a perfect square?
1)9                           
2)4                           
3)8                          
 4)7


21. Half of 1 per cent written as a decimal is:
1) 0.2                       
2) 0.02                   
3) 0.05                
4) 0.005

22. 800 chocolates were distributed among the students of a class. Each student got twice as many chocolates as the number of students in the class. The number of students in the class was:
1) 25                 
2)30                               
3)35                        
4)20

23. A runner runs 1  laps of a 5 lap race. What fractional part of the race remains to be run?
1)15/4                 
2)4/5                         
3)5/6                      
4)2/3

24. The numbers 2, 4, 6, 8……, 98, 100 are multiplied together. The number of zeros at the end of the product must be:
1)13                        
2)12                        
3)11                        
4)10

25. How many digits in al are required to write numbers from 1 to 50?
1) 100                     
2)92                        
3)91                        
4)50

26. The smallest possible three place decimal is:
1)0.012                
2)0.123               
3)0.111               
4) None of the above

27. If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 and taking away 4 from the product, the number is:
1) 2                          
2) 3                          
3)4                           
4)6

28. The sum of the squares of three consecutive natural numbers is 2030. Then, what is the middle number?
1)25                        
2)26                        
3)27                        
4)28

29. A number of friends decided to go on a picnic and planned to spend Rs. 108 on eatables. Three of them however did not turn up. As a consequence each one of the remaining had to contribute Rs.3 extra. The number of them who attended the picnic was:
1)15                        
2)12                        
3)9                           
4)6

30. The number 1, 3, 5, 7…………, 99 and 128 are multiplied together. The number of zeros at the end of the product must be:
1)19                        
2)22                       
3)7                           
4) Nil

31. The sum of the squares of two positive numbers is 100 and difference of their squares is 28. Find the sum of the numbers:
1)12                        
2)13                        
3)14                        
4)15

32. The divisor is 25 times the quotient and 5 times the remainder. If the quotient is 16, the dividend is:
1) 6400                
2) 6480                     
3) 400                      
4) 480


33. The smallest number added to 680621 to make the sum a perfect square is:
1)4                           
2)5                           
3)6                          
4)8

34. The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is:
1) Rs. 3750       
2) Rs. 3840          
3) Rs. 3500     
4) Rs. 3900

35. The sum of three consecutive odd natural numbers is 87. The smallest of these numbers is:
1) 29                       
2)31                        
3)23                        
4)27


Answer


1.            (1)
2.            (2)
3.            (3)
4.            (2)
5.            (3)
6.            (4)

7.            (3)
8.            (4)
9.            (2)
10.          (1)
11.          (3)
12.          (3)
13.          (2)
14.          (3) 
15.          (4)
16.          (3)
17.          (4)
18.          (1)
19.          (2)
20.          (4)
21.          (4)
22.          (4)
23.          (1)
24.          (3)
25.          (3)
26.          (4)
27.          (3)
28.          (2)
29.          (3)
30.          (3)
31.          (1)
32.          (4)
33.          (4)

 

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