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प्रश्न
Without adding, find the sum:
1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
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उत्तर
We know that the sum of first n odd natural numbers is n2.
Here, we have to find the sum of the first ten odd natural numbers.
Therefore, 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = (10)2 = 100
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संबंधित प्रश्न
Observe the following pattern and find the missing digits.
112 = 121
1012 = 10201
10012 = 1002001
1000012 = 1 ______ 2 ______ 1
100000012 = ______
Observe the following pattern and supply the missing number.
112 = 121
1012 = 10201
101012 = 102030201
10101012 = _____
____2 = 10203040504030201.
Without adding find the sum:
1 + 3 + 5 + 7 + 9
Express 49 as the sum of 7 odd numbers.
How many numbers lie between squares of the given numbers?
12 and 13
How many numbers lie between squares of the following numbers?
99 and 100
64 is the square number of __________
Fill in the blank box.
The sum of first n odd natural numbers is n2.
Express 81 as the sum of first nine consecutive odd numbers.
