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Number System

Number System
3√103823 = ?

44
41
52
47

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 3√103823 = 3√47 x 47 x 47 = 47

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

240
140
160
180

ANSWER DOWNLOAD EXAMIANS APP

Number System
83250÷?=74×25

45
59
38
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

45

Number System
If A + B = 30 and AB = 94, What is the value of A² + B² ?

824
920
712
625

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94                                = 900 - 188 = 712

Number System
If the difference between the squares of two consecutive numbers is 47, what is the smaller number ?

25
23
26
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23

Number System
75% of 250 - ?% of 380 = 54.5

31
33
39
35

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35

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