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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?

5084
6048
6184
6084

ANSWER DOWNLOAD EXAMIANS APP

Number System
5358 * 51 = ?

273348
273358
273268
273258

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258

Number System
Sum of the digits number is 8 and their product is 12. Find the difference between the digits?

2
None
6
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4

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

5400
1800
2700
10800

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

900 * 3 * 3 = 8100

Number System
If all the fractions 3/10, 1/16, 4/11, 2/9, 1/7, 5/14 and 5/24 arranged in descending order of their values, then which one will be the third?

2/9
1/16
3/10
4/11

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3/10 = 0.3, 1/16 = 0.0625, 4/11 = 0.36, 2/9 = 0.22, 1/7 = 0.14, 5/14 = 0.36 and 5/24 = 0.214/11 > 5/14 > 3/10 > 2/9 > 5/24 > 1/7 > 1/163/10 will be the third.

Number System
A number when multiplied by five times of itself give the value equal to 1445. What is the number ?

17
15
18
16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17

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