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Number System

Number System
(95.6x 910.3) ÷ 92.56256 = 9?

14.44
13.34
15.54
12.24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

13.34

Number System
The product of two consecutive odd numbers is 4095 What is the greater number ?

65
61
69
74

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the two consecutive odd numbers be 2x - 1 and 2x + 1.(2x - 1) (2x - 1) = 4095= 4x² - 1 = 4095= 4x² = 4096= x² = 1024∴ x = 32∴ The numbers are 63 and 65.Greater number = 65

Number System
Two-third of a positive number and 25/216 of its reciprocal are equal. The number is:

144/25
25/144
12/5
5/12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,2/3 x = 25/216 * 1/xx2 = 25/216 * 3/2 = 25/144 x = 5/12

Number System
If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ?

780
720
840
660

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660

Number System
If one-seventh of a number is 55 then 40% of that number = ?

147
171
154
163

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the no. be x ,             Therefore, x/7 = 55Therefore, x = 55 x 7 = 385Therefore, 49% of 385 = 154

Number System
The difference between 68% of a number and 35% of the same number is 1216. What is 28% of the number ?

1031.75
1043.75
1037.75
1027.75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the no. be xTherefore 68x / 100 - 35x / 100 = 1216      Therefore x = 1216 x 100 / 33Therefore 28% of x = 28x / 100 = 1216 x 100 / 33 x 28 / 100= 1216 x 100 x 28 / 33 x 1/100 = 1031.75

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