Question
What is the value of 1² + 3² + 5² +
7² + 9² ................ 19²?Solution
Sum of the squares of first n odd number = n(2n+1)(2n-1)/3 Where n = number of terms Here number of terms are 10 as last odd term is = 2n-1=19 So n =10 So required sum = 10 × 21 ×19/3 = 1330
'Excel' is related to 'Spreadsheet Software,' in the same way as 'PowerPoint' is related to '____.'
Complete the analogy:
Bald Eagle : USA :: Maple Leaf : ?Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
6 1 _ 9 _ 5 7 6 _ _ 9...
Select the set of numbers that is similar to the following set of numbers.
{22, 30, 38}
- Select the option that is related to third number cluster in the same way second number cluster is related to first number cluster.
16: 224 :: 25: ... Cobbler : Leather: : Weaver : ?
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
Select the word which does not belong to the same group from the given alternatives.
Medicine : Dispensary  ::  Aeroplane : ?
The second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/ar...
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