Question
Find the sum of the first 60 natural
numbers.Solution
Sum of first 'n' natural numbers = n(n + 1) ÷ 2
Required sum = 60 × (60 + 1) ÷ 2 = 60 × 61 ÷ 2 = 1830
Statements:
Some drives are laptops.
All laptops are keyboards.
No keyboard is a computer.
Conclusions:
I. Some...
A USB communication device that supports data encryption for secure wireless communication for notebook user is called a
A boat can cover 84 km in upstream in 2 hours, if the speed of the stream is 30% of the speed of boat in still water, then find the time taken by the bo...
Monthly savings of 'C' was 50% of her income. Later, her monthly income increased by 40% but her savings stayed the same. What is the percentage increas...
Statements : X < Q = I ≤ Y < U ≤ S = W > J = B > R
Conclusions :
I. X < W
II. S > R
There are five magazine M, N, O, P, and Q. Magazine O lies above P, magazine Q is below M, P is above M and N is below Q. Which magazine is at the bottom?
While tapping on to the potential of rapid technological development in the industry, Verbal, a brand specializing in music systems and other related ac...
How is Q related to Y?
Following is the step III for an input. What will be the second step for the input?
Step III: 45 47 342 121 55 211 414
If (x – (1/x) = 5√2), then calculate the value of {(x4 + (1/x4)} ÷ 1351}.
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