Quantitative Aptitude - Arithmetic Ability Questions

Q:

If α and β are the roots of equation x2   x + 1 = 0, then which equation will have roots α3 and β3?

A) x2 + 2x + 1 = 0 B) x2 – 2x – 1 = 0
C) x2 + 3x – 1 = 0 D) x2 – 3x + 1 = 0
 
Answer & Explanation Answer: A) x2 + 2x + 1 = 0

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Q:

The average weight of Sudesh, Jyothi and Ritu is 89 kg. If the average weight of Sudesh and Jyothi be 98 kg and that of Jyothi and Ritu be 83 kg, then the weight of Jyothi is

A) 58 B) 56
C) 95 D) 66
 
Answer & Explanation Answer: C) 95

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Q:

Average of 31 numbers is 19. If the average of first 8 numbers is 24, then what is the average of the remaining numbers?

A) 17.26 B) 23.25
C) 26.2 D) 25.45
 
Answer & Explanation Answer: A) 17.26

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Q:

The area of a rhombus is 24 m2 and the length of one of its diagonals is 8 m. The length of each side of the rhombus will be:

 

A) 5m B) 10m
C) 4m D) 6m
 
Answer & Explanation Answer: A) 5m

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Q:

If the shopkeeper sells an item at Rs 1000 which is marked as Rs 1250, then what is the discount he is offering?

A) 25 percent B) 33.3 percent
C) 250 percent D) 20 percent
 
Answer & Explanation Answer: D) 20 percent

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Q:

If a + b = 8 and ab =15, then a3 + b3 is

A) 224 B) 244
C) 152 D) 128
 
Answer & Explanation Answer: C) 152

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Q:

129 meter from the foot of a cliff on level of ground, the angle of elevation of the top of a cliff is 30°. The height of this cliff is

A) 50√3 metre B) 45√3 metre
C) 43√3 metre D) 47√3 metre
 
Answer & Explanation Answer: C) 43√3 metre

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Q:

If R019 is divisible by 11, find the value of the smallest natural number R?

A) 5 B) 6
C) 7 D) 8
 
Answer & Explanation Answer: D) 8

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