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Number System

Number System
35 + 15 * 1.5 = ?

75
57.5
51.5
5.25

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Given Exp. = 35 + 15 * 3/2 = 35 + 45/2 = 35 + 22.5 = 57.5

Number System
√360 - 225 x 2 + 379 = ?

20
18
19
17

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17

Number System
2/11 of 3/7 of 8/13 of 12012 = ?

576
241
449
321

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576

Number System
The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ?

76
73
75
74

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x + x + 1 + x + 2 + x + 3 + x + 4= 190= 5x + 10 = 190= 5x = 190 - 10 = 180= x = 180/5 = 36The largest number = 36 + 4 = 40∴ Required sum = 36 + 40 = 76

Number System
The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b

29 years
30 years
31 years
28 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years

Number System
The product of two consecutive odd numbers is 6723. Find is the greater number.

77
83
80
85

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83

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