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Number System

Number System
7.98 x 3.75 + 1.28 x 15.5 = ?

46.765
47.765
48.765
49.765

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 29.925 + 19.84 = 49.765

Number System
If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number.

86
91
94
97

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

94

Number System
68375 + 72848 - ? = 34346 + 49569

None of these
57308
58308
59308

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 68375 + 72848 - 34346 - 49569 = 141223 - 83915 = 57308

Number System
The product of two consecutive odd numbers is 4095 What is the greater number ?

74
61
65
69

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the two consecutive odd numbers be 2x - 1 and 2x + 1.(2x - 1) (2x - 1) = 4095= 4x² - 1 = 4095= 4x² = 4096= x² = 1024∴ x = 32∴ The numbers are 63 and 65.Greater number = 65

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

25 years
15 years
18 years
21 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the father's age be x and son's age yTherefore, x + y = 60   ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15

Number System
On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5?

2
1
0
4

ANSWER DOWNLOAD EXAMIANS APP
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