Ex4.1 Wow Maths ICSE Class 6
Answers
Answer:
he sum of three odd numbers is an even number.
(ii) The sum of two odd numbers and one even number is an even number.
(iii) The product of two even numbers is always an even number.
(iv) The product of three odd numbers is an odd number.
(v) If an even number is divided by 2, the quotient is always an odd number.
(vi) All prime numbers are odd.
(vii) All even numbers are composite.
(viii) Prime numbers do not have any factors.
(ix) A natural number is called a composite number if it has atleast one more factor other than 1 and the number itself.
Answer
Ex 4.1 Class 6 Maths Question 1.
Use the figure to name:
(a) Five points
(b) A line
(c) Four rays
(d) Five line segments
Solution:
(a) Five points are: O, B, C, E and D
NCERT Solutions for Class 6 Maths Chapter 4 Basic Geometrical Ideas
(b) Name of the line is DB←→ or BD←→.
(c) Four rays are: OC−→−, OB−→−, OE−→− and OD−→−
(d) Five line segments are:
OE¯¯¯¯¯¯¯¯, ED¯¯¯¯¯¯¯¯, OD¯¯¯¯¯¯¯¯, OB¯¯¯¯¯¯¯¯ and EB¯¯¯¯¯¯¯¯.
Ex 4.1 Class 6 Maths Question 2.
Name the line given in all possible (twelve) ways, choosing only two letters at a times from the four given.
NCERT Solutions for Class 6 Maths Chapter 4 Basic Geometrical Ideas
Solution:
The given lines can be named as follows:
NCERT Solutions for Class 6 Maths Chapter 4 Basic Geometrical Ideas