Olympiad – Class VII – Mathematics - Data Handling

Buy Olympiad -VII Standard Practice test pack

Question - 1

What is the arithmetic mean of 1, 2, ...., 9 and 10?

  • A 5.5
  • B 6
  • C 7.5
  • D 10

Question - 2

In a data, 10 numbers are arranged in increasing order. If the 7th entry is increased by 4, by how much does the median increase?

  • A Zero
  • B 4
  • C 6
  • D 5

Question - 3

What is the mean of x, x + 3, x + 6, x + 9 and x + 12?

  • A x + 3
  • B x + 6
  • C x + 9
  • D x + 12

Question - 4

The daily sales of kerosene (in litres) in a ration shop for six days is given in the box.
75, 120, 12, 50, 70.5, 140.5
What is the average daily sale?

  • A 150 l
  • B 10 l
  • C 142 l
  • D 78 l

Question - 5

The mean of five numbers is 27. If one of the numbers is excluded, the mean gets reduced by 2. What is the excluded number?

  • A 35
  • B 27
  • C 25
  • D 40

Question - 6

What is the median of the data 46, 64, 87, 41, 58, 77, 35, 90, 55, 33, 92?

  • A 87
  • B 77
  • C 58
  • D 60.2

Question - 7

Which of the following is true about mean?

  • A It occurs most frequently.
  • B It divides observations into two equal parts. 
  • C It is representative of the whole group.
  • D It is the sum of observations.

Question - 8

If each entry of a data is increased by 5, how does the mean change?

  • A Remains the same.
  • B Increases by 5.
  • C Decreases by 5
  • D Becomes half.

Question - 9

The arithmetic mean of five given numbers is 85. What is their sum?

  • A 425
  • B 85
  • C A number between 85 and 425.
  • D A number greater than 500.

Question - 10

The average weight of a sample of 10 apples is 52 g. Later it was found that the weighing machine had shown the weight of each apple 10 g less. What is the correct average weight of an apple?

  • A 62 g
  • B 54 g
  • C 56 g
  • D 52 g