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Number System

Number System
Complete the series : 81, 69, 58, 48, 39 ........

31
28
30
29

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

31

Number System
The digit in unit's place of a three digit number is thrice the digit in ten's place & the digit in hundred's place is two-third of the digit in ten's place. If the sum of three digits of number is 14

239
221
211
215

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the ten's digit be x.∴ Unit's digit = 3xHundered's digit = 2x/3∴ x + 3x + 2x/3 = 14= 3x + 9x + 2x = 14 x 3= 14x = 14 x 3= x = 3∴ Number = 239

Number System
A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?

6
3.5
8
None of these

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8

Number System
148 x 3.75 x 4 = 111 x ?

20
17
19
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 148 x 3.75 x 4/111 = 20

Number System
Twenty times a positive integer is less than its square by 96. What is the integer?

20
Cannot be determined
24
30

ANSWER DOWNLOAD EXAMIANS APP

Number System
Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is

44
38
72
56

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

72

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