Aptitude - Arithmetical Ability

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19.

If 5a= 3125, then the value of 5(a-3) is                        
A. 25 B. 125
C. 625 D. 1625



20.

The value of [(10)150 ÷ (10)146]                        
A. 1000 B. 10000
C. 100000 D. 106



21.

Given that 100.48 = x, 100.70 = y and xz = y², then the value of z is close to                        
A. 1.45 B. 1.88
C. 2.9 D. 3.7




22.

Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:                        
A. 1.45 B. 1.88
C. 2.9 D. 3.7



23.

The value of (256)5/4 is                        
A. 984 B. 512
C. 1014 D. 1024



24.

The value of (32/243)-4/5 is:                        
A. 4/9 B. 9/4
C. 16/81 D. 81/16



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