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Maths CBSE Live product
Class 7
Number Play
Numbers Tell us Things and Picking Parity
3.
TBQ - Explore the sum of odd numbers
Question:
6
m.
Find out
what happens to the sum of
:
(a)
28
odd numbers
(b)
29
odd numbers, and
(c)
30
odd numbers.
Ans
:
(a)
Reason
:
Sum of odd number of odd numbers is always an odd number.
Sum of odd number of odd numbers is always an even number.
Sum of even number of odd numbers is always an even number.
Sum of even number of odd numbers is always an odd number.
Ans
:
Sum of \(28\) odd numbers is an even number.
Sum of \(28\) odd numbers is an odd number.
(b) Reason:
Sum of odd number of odd numbers is always an even number.
Sum of odd number of odd numbers is always an odd number.
Sum of even number of odd numbers is always an odd number.
Sum of even number of odd numbers is always an even number.
Ans
:
Sum of \(29\) odd numbers is an odd number.
Sum of \(29\) odd numbers is an even number.
(c) Reason:
Sum of odd number of odd numbers is always an odd number.
Sum of odd number of odd numbers is always an even number.
Sum of even number of odd numbers is always an even number.
Sum of even number of odd numbers is always an odd number.
Ans
:
Sum of \(30\) odd numbers is an odd number.
Sum of \(30\) odd numbers is an even number.
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