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प्रश्न
Without adding find the sum:
1 + 3 + 5 + 7 + 9
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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 five odd natural numbers.
Therefore, 1 + 3 + 5 + 7 + 9 = (5)2 = 25
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संबंधित प्रश्न
The squares of which of the following would be odd numbers?
- 431
- 2826
- 7779
- 82004
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.
Using the given pattern, find the missing numbers.
12 + 22 + 22 = 32
22 + 32 + 62 = 72
32 + 42 + 122 = 132
42 + 52 + _ 2 = 212
52 + _ 2 + 302 = 312
62 + 72 + _ 2 = __2
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To find pattern:
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Without adding, find the sum:
1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
Express 121 as the sum of 11 odd numbers.
How many numbers lie between squares of the given numbers?
25 and 26
How many numbers lie between squares of the following numbers?
99 and 100
Fill in the blank box.
1, 3, 6, _______, 15, _______, 28
