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Number System

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

3
10
7
6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

10

Number System
83250÷?=74×25

21
59
38
45

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

45

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

1965
1955
1975
1945

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
(164 x 175) x ? = 258300

5
11
2
9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 258300 / 164 x 175 = 9

Number System
If 272/3 × 81-1/2 = 3x, the value of x is

1
3
0
2

ANSWER DOWNLOAD EXAMIANS APP

Number System
What is the difference between the local value of 7 and 5 in the number 2574?

413
430
403
570

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

500 – 70 = 430

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