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Number System

Number System
How many figures are required to number the pages the pages of a book containing 365 pages?

967
977
897
987

ANSWER DOWNLOAD EXAMIANS APP

Number System
If the difference between a number and its three fifths is 62, what is the number ?

165
145
155
175

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x - 3x/5 = 62or x = 62 x 5/2 = 155

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

154
163
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
728.038 x 54.978 - 72.016 x 85.250 = ?

43900
53900
23900
33900

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 728 x 55 - 72 x 85.25 = 40040 - 6138 = 339900

Number System
Find the greatest number which leaves the same remainder when it divides 25, 57 and 105.

16
12
18
8

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.

Number System
The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers?

296
252
344
388

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.

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