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Number System

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

1578
1247
1824
2096

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1824

Number System
Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number?

140
240
160
180

ANSWER DOWNLOAD EXAMIANS APP

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

20
23
22
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

21

Number System
A number consists of two digits. If the digits interchange places and the new number is added to the original number, then the resulting number will be divisible by:

3
11
9
5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the ten's digit be x and unit's digit be y. Then, number 10x + y.Number obtained by interchanging the digits = 10y + x.(10x + y) + (10y + x) = 11(x + y)which is divisible by 11.

Number System
What least number shall be added to 4700 to make it a perfect square ?

81
71
91
61

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.

Number System
If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ?

179
163
124
146

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x²   = 15376Therefore, x² = 15376                    x = 124

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