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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Calculations › Calculations Worksheet-21

Calculations Worksheet-21

Calculations Worksheet-21

 

  1. What fraction of  must be added to itself to make the sum ?

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

 

  1. Express of of Rs. 25.20 as a fraction of of Rs. 36.

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

 

  1. A 70 cm long wire is to be cut into two pieces such that one piece will be as long as the other. How many centimetres will the shorter piece be ?

(a) 10                  (b) 14                  (c) 20                  (d) 28

 

  1. A certain amount is distributed among A, B and C. A gets and B gets of the whole amount. If C gets Rs. 81, then B gets :

(a) Rs. 30          (b) Rs. 32          (c) Rs. 36           (d) Rs. 40

 

  1. of a pole is coloured red, white, blue, black, violet, yellow and the rest is green. If the length of the green portion of the pole is 12.08 metres, then the length of the pole is :

(a) 16 m             (b) 18 m             (c) 20 m             (d) 30 m

 

  1. In an examination, a student was asked to find of a certain number. By mistake, he found of that number. His answer was 150 more than the correct answer. The number is :

(a) 180               (b) 240               (c) 280               (d) 290

 

  1. A student was asked to find the value of of a sum of money. The student made a mistake by dividing the sum by and thus got an answer which exceeded the correct answer by Rs. 55. The correct answer was :

(a) Rs. 9             (b) Rs. 18           (c) Rs. 24           (d) Rs. 64

 

  1. If we multiply a fraction by itself and divide the product by its reciprocal, the fraction thus obtained is The original fraction is :

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

 

  1. The marks scored in an examination are converted from 50 to 10 for the purpose of internal assessment. The highest marks were 47 and the lowest were 14. The difference between the maximum and the minimum internal assessment scores is :

(a) 3.3                (b) 4.8                (c) 6.6                 (d) 7.4

 

  1. One–third of Rahul's savings in National Savings Certificate is equal to one–half of his savings in Public Provident Fund. If he has Rs. 1,50,000 as total savings, how much has he saved in Public Provident, Fund ?

(a) Rs. 30,000                              (b) Rs. 50,000

(c) Rs. 60,000                              (d) Rs. 90,000

 

  1. In a family, the father took of the cake and he had 3 times as much as each of the other members had. The total number of family members is :

(a) 3                    (b) 7                    (c) 10                  (d) 12

 

  1. A waiter's salary consists of his salary and tips. During one week his tips were  of his salary. What fraction of his income came from tips ?

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

 

  1. A sum of Rs. 1360 has been divided among A, B and C such that A gets of what B gets and B gets   of what C gets. B's share is :

(a) Rs. 120         (b) Rs. 160        (c) Rs. 240        (d) Rs. 300

 

  1. Three friends had dinner at a restaurant. When the bill was received, Amita paid as much as Veena paid and Veena paid as much as Tanya paid. What fraction of the bill did Veena pay ?

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

 

  1. of a tank holds 135 litres of water. What part of the tank is full if it contains 180 litres of water ?

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

 

  1. A tank is full. If 16 litres of water is added to the tank, it becomes   full. The capacity of the tank is :

(a) 28 litres       (b) 32 litres       (c) 35 litres        (d) 42 litres

 

  1. The fluid contained in a bucket can fill four large bottles or seven small bottles, A full large bottle is used to fill an empty small bottle. What fraction of the fluid is left over in the large bottle when the small one is full ?

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

 

  1. To fill a tank, 25 buckets of water is required. How many buckets, of water will be required to fill the same tank if the capacity of the bucket is reduced to two–fifth of its present ?

(a) 10                  (b) 35

(c)               (d) Cannot be determined

 

  1. Peter gave one–fourth of the amount he had to Michael. Michael in turn gave half of what he received from Peter to Sam. If the difference between the remaining amount with Peter and the amount received by Sam is Rs. 500, how much money did Michael receive from Peter ?

(a) Rs. 100        (b) Rs. 200        (c) Rs. 400        (d) Data inadequate

 

  1. A boy read th  of a book on one day and th  of the remainder on another day. If there were 30 pages unread, how many pages did the book contain ?

(a) 240               (b) 300               (c) 600               (d) None of these

 

Answer Key:

(1)-(c); (2)-(c); (3)-(c); (4)-(c); (5)-(a); (6)-(c); (7)-(a); (8)-(c); (9)-(c); (10)-(c); (11)-(c); (12)-(d); (13)-(c); (14)-(b); (15)-(b); (16)-(c); (17)-(b); (18)-(c); (19)-(b); (20)-(a)