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Number System

Number System
Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is

8.684
8.484
8.784
8.584

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

Number System
(1024—263—233)÷(986—764— 156) =?

6
None of these
8
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8

Number System
The average of 7 numbers is 15, that of the first three is 6 and that of the last three is 23. What is the fourth number?

15
13
7
18

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

4th No. = (Total of 7 Nos) - (Total of first three + total of last 3)             = (15 x 7) - (6 x 3 + 23 x 3)             = 105 - (18 + 69)             =105 - 87             = 18

Number System
The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is:

84
54
72
48

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72

Number System
735 chocolates were distributed equally among children in such a way that the number of chocolates received by each child is 60% of the total number of children. How many chocolates did each child rec

18
14
21
16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number of children be 'x' Therefore, each child will receiveX x 60/100 = 3x/5 chocolates∴ X x 3x/5 = 735∴ x² x 735x5/3 = 1225∴ x = 1225 = 35∴ Number of chocolates = 3x/5 = 21

Number System
What is the least number to be subtracted from 696 to make it a perfect square?

16
20
71
1

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The numbers less than 696 and are squares of certain numbers are 676, 625.The least number that should be subtracted from 696 to make it perfect square = 696 - 676 = 20.

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