CBSE Class 4 Maths Revision Worksheet Set 06

Ques.1 Teena watches television for 2 hours daily for how many hours she will be watching television in a week.
Answer: Number of hours Teena watches TV in a day = 2
Number of days in a week = 7
Total hours in a week = \(2 \times 7 = 14\)
In simple words: Multiply the daily hours by 7 days in a week to get the total hours.
Exam Tip: Remember that 1 week equals 7 days when solving time-related word problems.

Ques.2 Rahim works for 8 hours in a day what part of a day he spends in working?
Answer: Total hours in a day = 24
Number of hours Rahim works = 8
Fraction of the day spent working = \(\frac{8}{24} = \frac{1}{3}\)
In simple words: Divide the working hours by the total hours in a full day and simplify the fraction.

Exam Tip: Always reduce fractions to their simplest form by dividing the numerator and denominator by their highest common factor.

Ques.3 \(\frac{1}{5}\text{th}\) students in a class like cricket there are 40 students in the class. How many students don't like cricket?
Answer: Total number of students = 40
Students who like cricket = \(\frac{1}{5} \times 40 = 8\)
Students who don't like cricket = \(40 - 8 = 32\)
In simple words: Find one-fifth of the total students and subtract that number from the total class strength.

Exam Tip: Read questions carefully to check whether you need to find the part given or the remaining part.

Study the chart and answer the question that follows.

Ques.4 How many students like junk food?
Answer: Looking at the table, the number of children who like junk food is 30.
In simple words: Read the corresponding value from the 'Children who like' column for Junk Food.

Exam Tip: Trace rows and columns carefully when reading data from tables.

Ques.5 How many children don't like vegetables?
Answer: Looking at the table, the number of children who don't like vegetables is 28.
In simple words: Look at the 'Vegetable' row and check the value under 'Children who don't like'.

Exam Tip: Ensure you check the correct column heading before taking down values.

Ques.6 Which type of food is liked by maximum students?
Answer: Sweet (40 students like it, which is the highest number in the table).
In simple words: Find the highest number in the 'Children who like' column.

Exam Tip: Maximum means the greatest or highest value.

Ques.7 Which food item is liked by every student in the class?
Answer: Sweet (since 40 students like it and the total class strength is given as 40).
In simple words: Look for the food item where the number of liking students equals the total class size (40).

Exam Tip: Cross-check table values with total given parameters in the problem description.

Study the pie chart and answer the following questions:

Ques.8 What part of the total number of students knows dancing?
Answer: \(\frac{1}{4}\)
In simple words: The pie chart shows the circle divided into 4 equal parts, and 1 quarter represents students who know dancing.

Exam Tip: A full circle represents 1 whole, divided into 4 right-angled sectors of \(\frac{1}{4}\) each.

Ques.9 What part of the total number of students don't know dancing?
Answer: \(\frac{1}{2}\)
In simple words: Half of the pie chart represents students who do not know dancing at all.

Exam Tip: Two quarters combine to make one half (\(\frac{1}{4} + \frac{1}{4} = \frac{1}{2}\)).

Ques.10 If there are 60 students in a class, how many students know a little dancing?
Answer: Fraction of students who know a little dancing = \(\frac{1}{4}\)
Total students = 60
Number of students = \(\frac{1}{4} \times 60 = 15\)
In simple words: Multiply the total number of students by one-fourth.

Exam Tip: To find a fraction of a quantity, multiply the quantity by the numerator and divide by the denominator.

Ques.11 Looking at the bar diagram answer the following questions: How many teachers are teaching Maths?
Answer: 3
In simple words: Look at the height of the bar for Maths on the vertical axis, which reaches up to 3.

Ques.12 Which subject is being taught by maximum number of teachers?
Answer: Hindi (5 teachers)
In simple words: The tallest bar in the chart corresponds to Hindi.

Exam Tip: The highest bar always represents the maximum frequency.

Ques.13 What is the total number of teachers?
Answer: Maths = 3
Hindi = 5
English = 2
S.S.T = 1
Science = 4
Total teachers = \(3 + 5 + 2 + 1 + 4 = 15\)
In simple words: Add the values of all the bars together.

Exam Tip: Double check your addition when summing up values from all categories.

Ques.14 If two science teachers will go on leave next week, how many teachers will be left to teach science?
Answer: Total science teachers = 4
Teachers on leave = 2
Teachers left to teach science = \(4 - 2 = 2\)
In simple words: Subtract the number of teachers going on leave from the total science teachers.

Exam Tip: Always subtract when items or persons are removed from a group.

Ques.15 What is the total number of teachers who are teaching languages (Hindi and English)?
Answer: Hindi teachers = 5
English teachers = 2
Total language teachers = \(5 + 2 = 7\) (Note: Total teachers across all subjects is 15, key states 14 based on specific sheet grouping, but sum of Hindi and English is \(5 + 2 = 7\))
In simple words: Add the number of Hindi teachers and English teachers together.

Exam Tip: Group categories as specified in the question before performing addition.

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