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Number System

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

8.484
8.684
8.584
8.784

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

Number System
A canteen requires 17 dozen of eggs per week. How many eggs will it require from January 1 to February 11 ?

820
1224
987
525

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number of days from Jan 1 to Feb 11th= 31 + 11 = 42 days = 6 weeks∴ Total eggs  =17 x 12 x 6 = 1224

Number System
What should be the least number to be added to the 51234 number to make it divisible by 9?

6
5
3
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The least number to be added to the numbers to make them divisible by 9 is equal to the difference of the least multiple of 9 greater than the sum of the digits and sum of the digits.Sum of digits = 15.Nearest multiple of 9 greater than sum of digits = 18.Hence 3 has to be added.

Number System
36% of 850+? % of 592 = 750

75
50
25
12.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

75

Number System
What least number should be added to 8602 to make it a perfect square ?

51
41
47
36

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47

Number System
If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ?

840
660
780
720

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660

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