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Number System

Number System
If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is:

30
20
18
15

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20

Number System
What is the difference between the largest number and the least number written with the figures 3, 4, 7, 0, 3?

70983
43983
43883
43893

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

74330 Largest30347 Smallest-------------43983

Number System
In how many different ways can the letters of the word ANATOMY be arranged ?

2508
2510
2504
2520

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520

Number System
The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ?

Rs. 986
Rs. 926
Rs. 945
Rs. 1054

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054

Number System
If 35% of a number is 899.5, what is 68% of that number ?

1847.6
1547.6
2247.6
1747.6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6

Number System
If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is:

28
180
12
160

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.

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