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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
Which choice provides the answer in the following : If 2 * 3 = 36, 5 * 4 = 400, 6 * 2 = 144, 3 * 3 = 81; then, 5 * 5 = ?

525
425
325
625

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

625

Number System
2/11 of 3/7 of 8/13 of 12012 = ?

321
241
449
576

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576

Number System
If R2 = S3 = K, where R, S and K are integers. Find the smallest positive integral value of K. (Greater than 1)

64
88
75
54

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

64

Number System
In a pair of fractions, fraction A is twice the fraction B and the product of two fractions is 2/25. What is the value of fraction A?

1/5
2/5
Data inadequate
1/25

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

A = 2B => B = 1/2 A, so, AB = 2/25 1/2 A2 = 2/25A2 = 4/25 A = 2/5

Number System
The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is:

289
290/289
289/290
1/289

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289

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