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Number System

Number System
The difference between a number and its three-fifth is 50. What is the number?

100
None of these
125
75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.

Number System
A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is:

27
24
30
22

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

27

Number System
(12)² - (4.4)² - (0.04)² = ?

125.6384
131.6384
124.6384
129.6384

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384

Number System
Write the next number in the series : 14, 16, 13, 17, 12, 18, 11 ....

15
19
7
1

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

19

Number System
The difference between 35% of a number and 18% of the same number is 93.5 then what is the 40% of that number ?

220
225
232
245

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Diff = (35 - 18)% of x = 93.517x/100 = 93.5Therefore, x = 550Therefore, 40% of 550 = 220

Number System
What is the least number, which is perfect square but contains 2700 as its factor?

10800
1800
5400
2700

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

900 * 3 * 3 = 8100

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