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Number System

Number System
What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4?

6048
6084
6184
5084

ANSWER DOWNLOAD EXAMIANS APP

Number System
When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number?

103
99
97
101

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.

Number System
How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers?

1192
1092
1200
1082

ANSWER DOWNLOAD EXAMIANS APP

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
What is the least number, which is perfect square but contains 2700 as its factor?

2700
10800
5400
1800

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

900 * 3 * 3 = 8100

Number System
√9216 + √15376 = ?

224
220
227
231

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √9216 + √15376= 96 + 124= 220

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