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Number System

Number System
What is the difference between the largest and the smallest number written with 7, 7, 0, 7?

693
6993
6093
6893

ANSWER DOWNLOAD EXAMIANS APP

Number System
What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ?

76
75
77
78

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75

Number System
Find the number of factors of 300 excluding 1 and itself.

18
16
14
15

ANSWER DOWNLOAD EXAMIANS APP

Number System
If A = 1, B = 3, C = 5 and so on, what do the numbers 3, 9, 7 stand for

BAT
CAT
CAR
BED

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

BED

Number System
The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ?

82.5
84.5
85.5
83.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x + y = 165x - y = 92x = 174                         ∴ x = 87 and y = 78∴ x + y/2 = 165/2               = 82.5

Number System
(3² x 4² x 5) ÷ 36 = (?)² - 80

14
10
16
12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10

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