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Number System

Number System
What is the least number, which is perfect square but contains 2700 as its factor?

1800
10800
2700
5400

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

900 * 3 * 3 = 8100

Number System
Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is

44
38
56
72

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

72

Number System
A certain number successively divided by 2, 5 and 7 leaves remainders 1, 2 and 3 respectively. When the same number is divided by 70, what is the remainder?

33
35
36
34

ANSWER DOWNLOAD EXAMIANS APP

Number System
If 70% of an equal to 40% of b, then ratio between a and b is?

7: 4
7: 11
None
4: 7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

70 a = 40 ba: b = 4: 7

Number System
On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is:

48619
47649
47719
47619

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

By hit and trail, we find that47619 * 7 = 333333.7) 333333 (47619     333333----------------        0

Number System
What should come in place of question mark (?)? 8 : 1 1 : : 72:

79
89
109
99

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99

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