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Number System

Number System
64% of 2650+40% 0f 320=?

1247
2096
1578
1824

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1824

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 ?

660
840
780
720

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
A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits?

60
12
8
7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12

Number System
6.4 x 8.5 x 25/3.2 x 12.5 = ?

2.3
5.6
3.4
4.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4

Number System
What least number should be added to 8602 to make it a perfect square ?

47
41
51
36

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47

Number System
What least number must be subtracted from 2641 so that the remainder left, when divided by 10,15 and 25, is 7 in each case ?

94
81
84
87

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

LCM of 10, 15, 25 = 150When we drive 2641 by 150 the remainder is 91.But the remainder should be 7.So, the number to be subtracted from 2641 is 91 - 7 = 84.

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