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Number - Simple Calculation

SOURCE:GMAT
Number of Problems: 21.
FOR PRINT ::: (Book)

Problem Num : 11
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis
Solution/Hint


Problem Num : 12
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis (2) any 3 numbers...
Solution/Hint


Problem Num : 13
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis 8*7/2.. Why?
Solution/Hint


Problem Num : 14
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis
Solution/Hint


Problem Num : 15
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis Just focus on unit digits
Solution/Hint


Problem Num : 16
Type:
Topic:Number 
Theme:None
Adjustment# :
Difficulty: 1

Category Simple Calculation
Analysis
Solution/Hint


Problem Num : 17
Type:
Topic:Number 
Theme:None
Adjustment# : 0
Difficulty: 1

Category Simple Calculation
Analysis Pleasee express your idea first. Don't try to calculate first. If you try to calculate 12600/12 first, you will get a trap. In the other hand, (12600/12) *4 can be calculated by (12600/3)
Solution/Hint 4580- (12600/12) *4


Problem Num : 18
Type: Understanding
Topic:Number 
Theme:None
Adjustment# : 0
Difficulty: 500 level

Category Simple Calculation
Analysis
Solution/Hint Just count it.


Problem Num : 19
Type:
Topic:Number 
Theme:None
Adjustment# : 0
Difficulty: 1

Category Simple Calculation
Analysis Pigeonhole principle
Solution/Hint (2) we don't know how many...


Problem Num : 20
Type:
Topic:Number 
Theme:None
Adjustment# : 0
Difficulty: 1

Category Simple Calculation
Analysis (1)v=z=3 so,, r=3 (2)(s,t,u,x)=(1,2,1,2)... so r=3
Solution/Hint


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