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Number System

Number System
If three eighth of a number is 141. What will be the approximately value of 32.08% of this number?

60
90
120
160

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x * 3/8 = 141 => x= 376376 * 32.08/100 = 120

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

1
20
71
16

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.

Number System
How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ?

36
52
48
56

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36

Number System
If all the fractions 3/10, 1/16, 4/11, 2/9, 1/7, 5/14 and 5/24 arranged in descending order of their values, then which one will be the third?

2/9
3/10
1/16
4/11

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3/10 = 0.3, 1/16 = 0.0625, 4/11 = 0.36, 2/9 = 0.22, 1/7 = 0.14, 5/14 = 0.36 and 5/24 = 0.214/11 > 5/14 > 3/10 > 2/9 > 5/24 > 1/7 > 1/163/10 will be the third.

Number System
384×12×2=?

7487
8465
9216
6123

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

9216

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

12
28
160
180

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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