Page 296 - ICSE Math 6

2. 4. (a) Greatest: 31 min; shortest: 10 min
500 (b) Mean = 21.5 min; Median = 22.5 min
Money spent (in `) 300 1. (a) 15 (b) 1 (c) 2; 4 (d) 65
Mental Maths
400
2. (a) True (b) False (c) False (d) False (e) False
200
100 Practice Time
1.
0
Jan Feb Mar Apr May June 60
Months 50
3. (a) 35 40
(b) Maximum: Car; Minimum: Train Number of people 30
(c) 125 20
10
4. Scale: 1 unit = 10 marks 0
100 Classic Rock Jazz Pop
Types of music
90 2.
80 30
70 25
20
Marks 60 Number of students 15
50
40 10 5
30 0
20 Playing Watching Reading Visiting
sports TV books friends
10 Activities
0 3. (a) The bar graph represents the marks obtained in
English Hindi Maths Science History different subjects by a child.
Subjects
5. (b) Mathematics (c) Hindi
Scale: 1 unit = 5 candidates
40 (d) Hindi, History, Science, English, Mathematics
35 (e) Scale chosen: 1 unit = 20 marks
30
Number of candidates 25 5. (a) 56 kg (b) 60 kg (c) G
4. (a) Mean = 152.5 (b) Median = 146
20
6. (a) 9 runs per over (b) 180 runs
15
10
5 Think Smart
1. 31
0
Difficult Average Easy No comments 2. (a) True, as if x, y and z represent the heights of bars and
Difficulty level of competitive examination x + y + z
y is the mean, then = y, which on simplifying
6. (a) The bar graph represents the number of students x + z 3
in class VI of a school during the academic years gives 2 = y.
2005–06 to 2009–10. (b) False, as if x, y and z represent the heights of bars
(b) For 3 consecutive years the strength of the students such that x < y < z, then y represents the median and
increased uniformly and then it is decreased in the not z.
year 2009–10. 3. 5 4. 13 5. 73
(c) The number of students was maximum in the year
2008–09. Self-Testing Exercises
(d) The number of students in the year 2007–08 was Self-Testing Exercise 1
200, twice that of 100 in the year 2005–06.
1. 509, 590, 905, 950 2. Greatest: 995; Smallest: 100
Exercise 22.3
1. (a) 6.5 mm (b) 3 days 3. (a) 5,53,000 (b) 55,700 4. 24 5. 5 1 6 5
15
7
5
2. (a) 37.6 (b) 36.5 3. 41 kg 6. 2,103 7. 1.905 8. 27 < < 9. < 11 < 8
6
3
9
280