Question
What is the average of the squares of the first 35
natural numbers?Solution
Sum of squares of first 'n' natural numbers = n × (n + 1) × (2n + 1) ÷ 6
So, average = n × (n + 1) × (2n + 1) ÷ 6n = (n + 1) × (2n + 1) ÷ 6
= (35 + 1) × (2 × 35 + 1) ÷ 6
= 36 × 71 ÷ 6
= 426
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Malevolent
...In the following questions, out of the four alternatives, choose the one which best expresses the meaning of the given word as your answer.
SU...
An ornament fastened to clothing with a hinged pin
Choose the one which best expresses the meaning of the given word .
Clandestine
Suppress
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- Each of the following questions consists of two words which have a relationship to each other. This is followed by four pairs of related words. Choose the ...
 Select the word which means the same as the group of words given.
causing great damage or suffering
A person interested in collecting, studying and selling of old things .
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