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Number System

Number System
Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is

74
93
85
110

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

85

Number System
If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ?

124
179
163
146

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x²   = 15376Therefore, x² = 15376                    x = 124

Number System
In a pair of fractions, fraction A is twice the fraction B and the product of two fractions is 2/25. What is the value of fraction A?

1/5
1/25
2/5
Data inadequate

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

A = 2B => B = 1/2 A, so, AB = 2/25 1/2 A2 = 2/25A2 = 4/25 A = 2/5

Number System
Subtracting 30 from a number, the remainder is one fourth of the number. Find the number?

30
45
22 1/2
40

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3/4 x = 30 => x = 40

Number System
A shopkeeper purchased 200 bulbs for Rs. 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs. 12 each. What will be percentage profit?

33
14
17
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

12

Number System
If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ?

50
49
48
47

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48

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