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Number System

Number System
What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227

210
234
204
222

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Avg  = 173 + 192 + 198 + 204 + 211 + 223 + 227/7        = 1428/7        = 204

Number System
In a two-digit number, the digit in unit's place is two more than three times the digit in ten's place. If the sum of the two digits is 10, what is the number ?

22
18
28
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be 10x + y.∴ y = 3x + 2 .......(i)And, x + y = 10 ......(ii)From (i) and (ii), x = 2, y = 8∴ Number = 28

Number System
The square root of 3 + “5 is :

“5 /2 - 1/”2
“3 /2 - 1/”2
“3 /2 + 1/”2
“(5/2) + “(1/2)

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

“(5/2) + “(1/2)

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?

None of these
32
8
27

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
96% of a number is 19584. What is 56% of that number ?

11424
11324
11224
11524

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.According to the question.96% of x = 19584= x = 1958 x 100/96 = 20400∴ 56% of 20400= 20400 x 56/100= 11424

Number System
106 * 106 - 94 * 94 = ?

2000
1906
2400
1904

ANSWER DOWNLOAD EXAMIANS APP
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