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Number System

Number System
How many figures are required to number the pages the pages of a book containing 365 pages?

977
987
967
897

ANSWER DOWNLOAD EXAMIANS APP

Number System
Find the least number with which 16200 should be multiplied, to make it a perfect cube.

36
360
45
48

ANSWER DOWNLOAD EXAMIANS APP

Number System
The product of two consecutive odd numbers is 6723. Find is the greater number.

77
85
83
80

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83

Number System
If a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ?

120
180
60
260

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120

Number System
The sum of a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root?

27
8
32
None of these

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.

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

68
63
67
78

ANSWER DOWNLOAD EXAMIANS APP
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