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Number System

Number System
Let R = qs—4. When s=8, R=16. When s=10, R is equal to

22
21
23
20

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

21

Number System
In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is

775
750
640
725

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Failed students are 32% which is 248.∴ Total = 24800/32 = 775

Number System
The cost of 87 pens and 29 pencils is `783. What is the cost of 90 pens and 30 pencils ?

Rs. 820
Rs. 800
Rs. 830
Rs. 810

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the price of a pen be 'x' and that of pencil be 'y' Then 87x + 29y = 783Multiplying eqn (i) by 30/29 we get (87x) x 30/29  + (29y) 30/29 = 783 x 30/29∴ 90x + 30y = 810

Number System
Of an amount, 20% of 25% of 30% is Rs 75. Then what is the original amount ?

Rs. 2000
Rs. 4000
Rs. 5000
Rs. 3000

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the amount be x.∴ X x 20/100 x 25/100 x 30/100 = 75∴ X = 75 x 5 x 4 x 10/3  = 5000

Number System
Find the smallest number which should be multiplied with 520 to make it a perfect square.

None of these
55
30
120

ANSWER DOWNLOAD EXAMIANS APP

Number System
Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is

8.684
8.484
8.784
8.584

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

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