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Number System

Number System
Which one of the following represents the sum of the first n even numbers?

N2
N(N – 1)
N(N + 1)
N2+ 1

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N (N + 1)

Number System
Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number?

180
160
240
140

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Number System
The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ?

6782
5183
8795
7745

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√4623 = 6767 x 69 = 4623∴ Required product = 71 x 73                               = 5183

Number System
What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ?

77
78
76
75

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2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75

Number System
486+32×25—59=?

582
596
528
567

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

528

Number System
Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is:

4
5
6
10

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