Maharashtra Board Practice Set 13 Class 6 Maths Solutions Chapter 4 Operations on Fractions

Maharashtra Board Practice Set 13 Class 6 Maths Solutions Chapter 4 Operations on Fractions

6th Standard Maths Practice Set 13 Answers Chapter 4 Operations on Fractions

Question 1.
Write the reciprocals of the following numbers:

1. 7
2. 11/3
3. 5/13
4. 2
5. 6/7

Solution:

1. 1/7
2. 3/11
3. 13/5
4. 1/2
5. 7/6

Question 3.
There were 420 students participating in the Swachh Bharat Campaign. They cleaned 42/75 part of the town, Sevagram. What part of Sevagram did each student clean if the work was equally shared by all?
Solution:
Total number of students = 420
Part of town cleaned by all the students = 42/75
∴ Part of town cleaned by one student

∴ Part of town cleaned bv one student is 1/750

Maharashtra Board Class 6 Maths Chapter 4 Operations on Fractions Practice Set 13 Intext Questions and Activities

Question 1.
Ramanujan’s Magic square. (Textbook pg. no. 28)

• Add the four numbers in the rows, the columns and along the diagonals of this square.
• What is the sum?
• Is it the same every time?
• What is the peculiarity?
• Look at the numbers in the first row, 22 – 12 – 1887. Find out why this date is special.

Obtain and read a biography of the great Indian mathematician Srinivasa Ramanujan.
Solution:
Sum of the numbers in each row:
i. 22 + 12 + 18 + 87 = 139
ii. 88 + 17 + 9 + 25 = 139
iii. 10 + 24 + 89 + 16 = 139
iv. 19 + 86 + 23 + 11 = 139

Sum of the numbers along the diagonals:
i. 22 + 17 + 89 + 11 = 139
ii. 87 + 9 + 24 + 19 = 139

Sum of the numbers in each column:
i. 22 + 88 + 10 + 19 = 139
ii. 12 + 17 + 24 + 86 = 139
iii. 18 + 9 + 89 + 23 = 139
iv. 87 + 25 + 16 + 11 = 139

∴ We observe that the sum of the numbers in each of the rows, the columns and along each diagonal remains the same every time. The numbers in the first row 22 – 12 – 1887 is the birth date of Srinivasa Ramanujan.