Data Handling and Symmetry Quiz

Find the value of 4x - 8, where x is the mean of first five odd prime numbers.

1. 7.8
2. 13.6
3. 23.2
4. 48

Answer: (c) 23.2

Find the difference between the angle of rotation of a square and a regular pentagon.

1. 18°
2. 45°
3. 72°
4. 108°

Answer: (a) 18°

The average score of the students in a class is 82. After revaluation, the teacher increases the marks of two students by 5 points each. As a result, the average score increases by 0.25. How many students are in the class?

1. 15
2. 20
3. 25
4. 40

Answer: (d) 40

The following graph represents the marks obtained(out of 100) by Peter in half-yearly examinations in five different subjects: English, mathematics, science, social studies and computer science. Find the difference between the marks obtained in science and the average of the marks obtained in all the subjects.

1. 4
2. 12
3. 14
4. 18

Answer: (c) 14

What is the correct descending order of arranging the following figures on the basis of the order of their rotational symmetry? P: Square Q: Regular hexagon R: Trapezium S: Equilateral triangle U: Parallelogram

1. S, P, Q, U, R
2. R, U, S, P, Q
3. P, Q, S, R, U
4. Q, P, S, U, R

Answer: (d) Q, P, S, U, R

Determine the value of y if the mean of the following data is 30.8. 24, 2b - 13, 30, b, b + 9

1. 20.8
2. 26
3. 28
4. 30

Answer: (b) 26

The following bar-graph represents the number of ice-creams sold by a shop on different days of a particular week: How many more ice creams need to be sold on Thursday so that the total number of ice creams sold on Thursday will become equal to five-sevenths of the total number of ice creams sold on Tuesday and Saturday?

1. 16
2. 17
3. 31
4. 35

Answer: (b) 17

Determine the range of the following data set given that its mean is 100. 104, 93, 97, n, 108, 106

1. 13
2. 14
3. 15
4. 16

Answer: (d) 16

The following data represents the number of cars sold by a company in seven different months. How many more cars must be sold in September in order to earn $630,000, given that the price of one car is $45,000?

1. 5
2. 9
3. 14
4. 15

Answer: (a) 5

Which of the following statements are true? I: The letter N has no line of symmetry and has rotational symmetry of order 2. II: An isosceles triangle has one line of symmetry and rotational symmetry of order 2. III: The letter A has one line of symmetry and rotational symmetry of order 1. IV: A scalene triangle has no lines of symmetry and a rotational symmetry of order 2.

1. II and III
2. I, II and III
3. I and III
4. I, II and IV

Answer: (c) I and III