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Number System

Number System
If 2^(2x-1) = 8^(3-x), then the value of x is:

6
2
9
5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2

Number System
When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ?

47
45
46
44

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46

Number System
Four-fifth of a number is 10 more than two-third of the same number. What is the number?

75
91
35
89

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

75

Number System
(800 / 64) * (1296 / 36) = ?

460
500
None of these
420

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Given Exp.= 800/64 * 1296/36 = 12.5 * 36 = 450

Number System
If 272/3 × 81-1/2 = 3x, the value of x is

2
3
1
0

ANSWER DOWNLOAD EXAMIANS APP

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

77
80
85
83

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

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