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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Calculations › Calculations Worksheet-15

Calculations Worksheet-15

Calculations Worksheet-15

 

  1. By how much is three–fifth of 350 greater than four–seventh of 210 ?

(a) 95                  (b) 110                (c) 120                (d) None of these

 

  1. By how much does exceed ?

(a)                 (b)                 (c)                 (d)

 

  1. If of an estate be worth Rs. 16,800, then the value of of the estate is :

(a) Rs. 9000     (b) Rs. 21,000  (c) Rs. 72,000  (d) Rs. 90,000

 

  1. Two–fifth of one–fourth of three–seventh of a number is 15. What is half of that number?

(a) 94                  (b) 96                 (c) 188                (d) None of these

 

  1. One–fifth of a number exceeds one–seventh of the same by 10. The number is :

(a) 125                (b) 150                (c) 175                (d) 200

 

  1. If x * y = x2 + y2 – xy, then the value of 9 * 11 is :

(a) 93                  (b) 103               (c) 113                 (d) 121

 

  1. If a * b = find the value of 3 * (3 * –1).

(a) –3                 (b) –1.5              (c) –1                  (d)

 

  1. If a * b = 2a – 3b + ab, then 3*5 + 5*3 is equal to :

(a) 22                  (b) 24                 (c) 26                  (d) 28

 

  1. If , what is the value of p if

(a) 4                    (b) 7                    (c) 8                    (d) 12.5

 

  1. If a * b * c means for all numbers except 0, then (a * b * c) * a * b is equal to :

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

 

  1. 7 is added to a certain number; the sum is multiplied by 5; the product is divided by 9 and 3 is subtracted from the quotient. The remainder left is 12. The number is :

(a) 20                 (b) 30                 (c) 40                  (d) 60

 

  1. The value of is :

(a)               (b) 1                    (c)                    (d)

 

  1.  

(a)                 (b)                 (c)                (d) None of these

 

  1.  

(a)                  (b)               (c) 8                    (d)

 

  1.  

(a)                  (b)                 (c)                 (d) None of these

 

  1.  

(a)                   (b) 8                    (c)               (d) 9

 

Answer Key:

(1)-(d); (2)-(b); (3)-(a); (4)-(d); (5)-(c); (6)-(b); (7)-(a); (8)-(a); (9)-(a); (10)-(d); (11)-(a); (12)-(c); (13)-(d); (14)-(d); (15)-(d); (16)-(b)