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Number System

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

8.584
8.684
8.784
8.484

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

21 years
18 years
25 years
15 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the father's age be x and son's age yTherefore, x + y = 60   ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15

Number System
On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5?

2
1
4
0

ANSWER DOWNLOAD EXAMIANS APP

Number System
What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345?

2345
5243
2105
2435

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2000 + 300 + 40 + 5 = 2345

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

3
5
4
6

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
A number when divided by 221 gives a remainder 43, what remainder will be obtained by dividing the same number 17?

11
5
9
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

221 + 43 = 264/17 = 9 (Remainder)

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