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Number - Square Root

For GMAT
Number of Total Problems: 14.
FOR PRINT ::: (Book)

Problem Num : 1
Type: Modification
Section:Number 
Theme:None
Adjustment# : 0
Difficulty: 1

Category Square Root
Analysis How will u eliminate the square root?

Solution/Answer

Answer: B



Problem Num : 2
Type: Mathematical Writing
Section:Number 
Theme:None
Adjustment# : 0
Difficulty: 600 level

Category Square Root
Analysis 1/2 sqrt (x) = 2x.

Solution/Answer 1/2 sqrt (x) = 2x. sqrt (x) = 4x. x= 16x^2 1/16 =x

Answer: A



Problem Num : 3
Type: Modification
Section:Number 
Theme:None
Adjustment# : 1
Difficulty: 600 level

Category Square Root
Analysis How can u modify it to add those terms? Can u add sqrt(2)+sqrt(3)?

Solution/Answer sqrt(80)+sqrt(125) = 4sqrt(5)+5sqrt(5)

Answer: A



Problem Num : 4
Type: Calculation
Section:Number 
Theme:None
Adjustment# : 20
Difficulty: 500 level

Category Square Root
Analysis (sqrt a)^2=a

Solution/Answer 4*7=?

Answer: C



Problem Num : 5
Type:
Section:Number 
Theme:None
Adjustment# : 21
Difficulty: 1

Category Square Root
Analysis

Solution/Answer

Answer: A



Problem Num : 6
Type:
Section:Number 
Theme:None
Adjustment# : 21
Difficulty: 1

Category Square Root
Analysis

Solution/Answer

Answer: d



Problem Num : 7
Type: Understanding
Section:Number 
Theme:None
Adjustment# : 22
Difficulty: 500 level

Category Square Root
Analysis We need an relationship between n and n^2 We need an relationship between n and sqrt(n)

Solution/Answer sqrt(n^2) =|n| sqrt(n)^2 = n (1)it's not sufficient. (2)It's sufficient because square of integer is also integer.

Answer: B



Problem Num : 8
Type: Modification
Section:Number 
Theme:Mixed Topics
Adjustment# : 22
Difficulty: 600 level

Category Square Root
Analysis Do you know the most important formula in GMAT math? \[(a - b)(a + b) = {a^2} - {b^2}\]

Solution/Answer (2-1)(3-1)=2

Answer: a



Problem Num : 9
Type:
Section:Number 
Theme:None
Adjustment# : 23
Difficulty: 1

Category Square Root
Analysis

Solution/Answer

Answer: E



Problem Num : 10
Type:
Section:Number 
Theme:None
Adjustment# : 26
Difficulty: 1

Category Square Root
Analysis

Solution/Answer

Answer: D



Array ( [0] => 4647 [1] => 6089 [2] => 4667 [3] => 4670 [4] => 4865 [5] => 6158 [6] => 5018 [7] => 6061 [8] => 4731 [9] => 4727 ) 141  2