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Number System

Number System
(164 x 175) x ? = 258300

9
11
2
5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 258300 / 164 x 175 = 9

Number System
If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ?

689
692
652
678

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652

Number System
The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is:

1/289
289
290/289
289/290

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289

Number System
The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ?

5183
7745
8795
6782

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

√4623 = 6767 x 69 = 4623∴ Required product = 71 x 73                               = 5183

Number System
The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers?

170
169
171
168

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

168

Number System
When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ?

45
55
35
65

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45

MORE MCQ ON Number System

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