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Number System

Number System
(1024—263—233)÷(986—764— 156) =?

None of these
8
6
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8

Number System
(3² x 4² x 5) ÷ 36 = (?)² - 80

16
14
12
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10

Number System
What is the greater of the two numbers whose product is 2560, given that the sum of the two numbers exceeds their difference by 64?

None of these
100
90
110

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the greater and the smaller number be g and s respectively.gs = 2560g + s exceeds g - s by 64 i.e., g + s - (g - s) = 64i.e., 2s = 64 => s = 32.g = 2560/s = 80.

Number System
1256+4813+765=?

6836
6839
6834
6831

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1256+4813+765= 6069+765=6834

Number System
If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ?

720
840
660
780

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660

Number System
In how many different ways can the letters of the word 'DETERMINE' be arranged ?

63480
60480
62480
61480

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

No. of arrangements = 9! / 3! Because, E comes 3 times = 60480

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