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Number System

Number System
What is the value of ? in the following equations ? 72/? = ?/50

80
40
60
100

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60

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
32
8
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
If HKUJ means FISH, what does UVCD mean ?

STAR
STAB
STAK
STAM

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

STAB

Number System
{(742)² ÷ 36} ÷ 2 = ?

420.5
421.5
423.5
422.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = (174 x 174/36) ÷ 2 = 841/2 = 420.5

Number System
What will be the next number in the following number series ?

177
162
191
182

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1² + 1, 3² + 3, 5² + 5, 7² + 7

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

8
3.5
6
None of these

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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