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Number System

Number System
Find the number of factors of 300 excluding 1 and itself.

16
14
18
15

ANSWER DOWNLOAD EXAMIANS APP

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

1092
1200
1192
1082

ANSWER DOWNLOAD EXAMIANS APP

Number System
Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number

5
7.5
4
15

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5

Number System
Look at this series: 1000, 200, 40, ... What number should come next?

24
2
8
14

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

This is a simple division series. Each number is divided by 5. Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...So answer is a = 8.

Number System
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

30
40
None of these
20

ANSWER DOWNLOAD EXAMIANS APP

Number System
√9216 + √15376 = ?

220
227
231
224

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √9216 + √15376= 96 + 124= 220

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