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Number System

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

163
154
171
147

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
A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

18
81
42
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.

Number System
If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ?

17
13
15
11

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)²                       = 1394 - 1225                       = 169Therefore, x = √169 = 13

Number System
If HKUJ means FISH, what does UVCD mean ?

STAR
STAK
STAM
STAB

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

STAB

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

16
14
18
15

ANSWER DOWNLOAD EXAMIANS APP

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

75
76
73
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

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