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Number System

Number System
{(742)² ÷ 36} ÷ 2 = ?

421.5
422.5
423.5
420.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = (174 x 174/36) ÷ 2 = 841/2 = 420.5

Number System
Three numbers are in ratio of 3: 4 :5. If the sum of first & third numbers is more than second number by 52, which will be largest number?

78
34
65
23

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

65

Number System
Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers?

12, 9
10, 5
11, 6
12, 7

ANSWER DOWNLOAD EXAMIANS APP

Number System
0.333 .... × 0.444 .... is equal to

0.121212 ....
0.777 ....
1.333 ....
0.148148148 ....

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

0.148148148 ....

Number System
Which is the smallest fractions among the following ?

27/31
11/13
13/15
15/19

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

11/13 = 0.8461,13/15 = 0.8666,27/31 = 0.87,15/19 = 0.789

Number System
A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ?

6383
6363
6353
6373

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x + x + 1 + x + 2 + x + 3 + x + 4  = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80  ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383

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