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Number System

Number System
When 102 is reduced from a number, the number gets reduced by 88%. What is that number ?

850
750
550
650

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

850

Number System
The sum of the digits of a two-digit number is 12, and the difference between the number and the number obtained by interchanging the two digits of the number is 18. Find the number.

50
25
12.5
75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be 10x + y.∴ x + y = 12    ...........(i)10x + y - (10x + x) = 18or 10x + y - 10y - x = 18or 9x - 9y = 18∴ x - y = 2From (i) and (ii), x = 7, y = 5∴ Number = 75

Number System
16.23 x 12.9 + 17.32 = ?

None of these
226.687
246.687
236.687

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687

Number System
What is the difference between the largest and the smallest number written with 7, 7, 0, 7?

6993
6093
6893
693

ANSWER DOWNLOAD EXAMIANS APP

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

3
5
6
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
In how many different ways can the letters of the word 'FRUGAL'be arranged ?

556
720
515
660

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

In FRUGAL there ae six difference letters Therefore, 6 !                       = 6 x 5 x 4 x 3 x 2 x 1 = 720

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