Samacheer Kalvi 8th Maths Solutions Term 1 Chapter 5 Information Processing Intext Questions

Tamilnadu Samacheer Kalvi 8th Maths Solutions Term 1 Chapter 5 Information Processing Intext Questions

Try these (TextBook Page No 122)

Question 1.
Find the number of all possible triangles that can be formed from the triangle given below.
Solution:

Question 2.
Use the given figure to form a 3 × 3 magic square.

Solution:

Question 3.
Convert the tree diagram into a numeric expression

Solution:
(10 × 5) + (9 × 4)

Question 4.
(i) Find out the total time taken by the bus to reach from A to E via B , C and D.
(ii) Find which is the shortest route from A to E.
Solution:

(i) Route ⇒ 2A ➝ B ➝ C ➝ D ➝ E
Time taken ⇒ (7 + 5 + 3 + 6) hrs = 21 hrs

Try this (TextBook Page No 127)

Question 1.
Kumar has four different hats. He always wears a hat. Sometimes he wears the same hat more than once in a week as in the figure.

In how many different ways might he decide to wear his hats in one week?
Solution:

H1, H2, H3, H4 be Hat 1, Hat 2, Hat 3, Hat 4 respectively.
∴ In 7 × 4 = 28 different ways kumar may decide to wear his hat in one week.

Exercise 5.1

Try these (TextBook Page No 134)

Question 1.
Find any four SETs among these set of cards.

Solution:

Question 2.
This is an example for a magic square in SETs, can you make another one?

Solution:

Try this (TextBook PageNo 137)

Question 1.
Think why this graph colouring is invalid?

Solution:
The objective of graph colouring is to assign minimum number of colours to the verties do not have the same colour.
Here adjacent edges have the same colour.
∴ It is invalid.