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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Calculations › Calculations Worksheet-24

Calculations Worksheet-24

Calculations Worksheet-24

 

  1. A worker may claim Rs. 1.50 for each km which he travels by taxi and 50 p for each km he drives his own car. If in one week he claimed Rs. 50 for travelling 80 km, how many kms did he travel by taxi ?

(a) 10                  (b) 20                 (c) 30                  (d) 40

 

  1. In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts in all 60 questions and secures 130 marks, the number of questions he attempts correctly, is :

(a) 35                  (b) 38                 (c) 40                  (d) 42

 

  1. A cricket team won 3 matches more than they lost. If a win gives them 2 points and loss (— 1) point, how many matches, in all, have they played if their score is 23 ?

(a) 17                  (b) 20                 (c) 37                  (d) 40.

 

  1. A total of 324 coins of 20 paise and 25 paise make a sum of Rs. 71. The number of 25–paise coins is :

(a) 120                (b) 124                (c) 144                (d) 200

 

  1. A man has Rs. 480 in the denominations of one–rupee notes, five–rupee notes, and ten–rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

(a) 45                  (b) 60                 (c) 75                  (d) 90

 

  1. Eight people are planning to share equally the cost of a rental car. If one person withdraws from the arrangement and the others share equally the entire cost of the car, then the share of each of the remaining persons increased by :

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

 

  1. On Children's Day, sweets were to be equally distributed among 175 children in a school. Actually on the Children's Day, 35 children were absent and therefore each child got 4 sweets extra. Total how many sweets were available for distribution ?

(a) 2400            (b) 2480            (c) 2680             (d) None of these

 

  1. A certain number of tennis balls were purchased for Rs. 450. Five more balls could have been purchased in the same amount if each ball was cheaper by Rs. 15. The number of balls purchased was :

(a) 10                  (b) 15                  (c) 20                  (d) 25

 

  1. A piece of cloth costs Rs. 35. If the length of the piece would have been 4 m longer and each metre costs Re. 1 less, the cost would have remained unchanged. How long is the piece ?

(a) 9 m               (b) 10 m             (c) 12 m              (d) 14 m

 

  1. 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 :

(a) Rs. 3500      (b) Rs. 3750      (c) Rs. 3840      (d) Rs. 3900

 

  1. In a certain shop, 9 oranges cost as much as 5 apples, 5 apples cost as much as 3 mangoes and 4 mangoes cost as much as 9 lemons. If 3 lemons cost Rs. 4.80, the price of an orange is :

(a) Rs. 1.20       (b) Rs.  1.30      (c) Rs.  1.40       (d) Rs. 1.50

 

  1. The price of 2 sarees and 4 shirts is Rs. 1600. With the same money one can buy 1 saree and 6 shirts. If one wants to buy 12 shirts, how much shall he have to pay ?

(a) Rs. 1200                                   (b) Rs. 2400

(c) Rs. 4800                                  (d) Cannot be determined

 

  1. If 2 tables and 3 chairs cost Rs. 3500 and 3 tables and 2 chairs cost Rs. 4000, then how much does a table cost ?

(a) Rs. 500        (b) Rs. 750        (c) Rs. 1000      (d) Rs. 1500

 

  1. The taxi charges in a city comprise of a fixed charge, together with the charge of the distance covered. For a journey of 16 km, the charges paid are Rs. 156 and for a journey of 24 km, the charges paid are Rs. 204. What will a person have to pay for travelling a distance of 30 km ?

(a) Rs. 236        (b) Rs. 240        (c) Rs. 248        (d) Rs. 252

 

  1. In a classroom, if 6 students per bench are assigned to accommodate all students, one more bench will be required. However, if 7 students are accommodated per bench, there would be a space left for 5 students. What is the number of students in the class ?

(a) 30                 (b) 42                 (c) 72                  (d) None of these

 

  1. There are two examination rooms A and B. If 10 students are sent from A to .B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is :

(a) 20                 (b) 80                 (c) 100                (d) 200

 

  1. In a group of buffaloes and ducks, the number of legs are 24 more than twice the number of heads. What is the number of buffaloes in the group ?

(a) 6                    (b) 8                    (c) 10                  (d) 12

 

  1. A man has some hens and cows. If the number of heads be 48 and the number of feet . equals 140, then the number of hens will be :

(a) 22                  (b) 23                 (c) 24                  (d) 26

 

  1. Vidushi and Sanya distribute Rs. 100 each in charity. Vidushi distributes money to 5 more people than Sanya and Sanya gives each Re. 1 more than Vidushi. How many people are recipients of the charity ?

(a) 45                  (b) 60                 (c) 90                  (d) None of these

 

  1. Which of these is a CORRECT rule of order of operation?

(a) Additions are done first.

(b) Calculations must be done from right to left.

(c) Calculations in parenthesis are done first.

(d) Exponents must be done last.

 

Answer Key:

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