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Number System

Number System
√9216 + √15376 = ?

231
224
227
220

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √9216 + √15376= 96 + 124= 220

Number System
Simplify the 121 * 175 + 363 * 275

328100
None of these
363000
316600

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

Number System
If the sum of the two numbers is 22 and the sum of their squares is 404, then the product of the numbers is:

88
44
40
80

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be x and y. Then, (x + y) = 22 and x2 + y2 = 404 Now, 2xy = (x + y)2 - (x2 + y2) 2xy= 222 - 404 = 484 - 404 = 80xy = 40

Number System
What least number should be added to 8602 to make it a perfect square ?

47
51
36
41

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47

Number System
The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:

3/10
5/4
3/5
4/5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5

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

180
140
160
240

ANSWER DOWNLOAD EXAMIANS APP
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