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Number System

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

120
None of these
55
30

ANSWER DOWNLOAD EXAMIANS APP

Number System
In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend?

5553
56053
50553
55053

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

120 * 456 + 333 = 55053

Number System
The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ?

27.84
21.84
24.84
25.84

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84

Number System
On dividing a number by 68, we get 269 as quotient and 0 as remainder. On dividing the same number by 67, what will be the remainder?

3
1
2
0

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number = 269 * 68 + 0 = 1829267) 18292 (273       18291         --------                1Required number = 1.

Number System
If x + y = 61 and xy = 888, What is the value of x²+ y² ?

1975
1945
1955
1965

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Because (x + y)²  = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945

Number System
Find the least value of 3x + 4y if x2y3 = 6.

3
10
7
6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

10

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