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Number System

Number System
The product of two successive numbers is 4556. Which of the following is the larger of the two numbers?

63
67
78
68

ANSWER DOWNLOAD EXAMIANS APP

Number System
(√6 + 1)² = ? + 2√6

8
5
6
7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7

Number System
Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is:

36
27
30
18

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(3x-9):(5x-9) = 9:17 x = 12 => 3x = 36

Number System
A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?

3.5
6
None of these
8

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8

Number System
Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number

15
7.5
5
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5

Number System
Simplify the 121 * 175 + 363 * 275

None of these
363000
316600
328100

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

121 * 175 + 363 * 275 => 121 * 175 + 121 * 3 * 275121 * 175 + 121 * 825= 121 * (175 + 825) = 121000

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