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Number System

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
54
75
88

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

64

Number System
If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is:

28
180
12
160

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.

Number System
The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number?

39
59
69
49

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

39

Number System
If 5/7 of a number is 145, what is 180% of that number ?

355.4
365.4
345.4
375.4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x x 5/7 = 145∴ x = 145 x 7/5 = 203Now, 203 x 180/100 = 365.4

Number System
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ?

3
2
4
1

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4

Number System
How many figures are required for numbering the pages of a book containing 1000 pages?

3892
6489
2883
2893

ANSWER DOWNLOAD EXAMIANS APP
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