For any two real numbers a and b. a-b2+b-a2 | Quantitative Aptitude - Arithmetic Ability Questions & Answers

Q:

In a triangle ABC, AB = 8 cm, AC = 10 cm and ∠B = 90°, then the area of ΔABC is

A) 49 sq.cm	B) 36 sq.cm
C) 25 sq.cm	D) 24 sq.cm

Answer & Explanation Answer: D) 24 sq.cm

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Q:

The perimeter of two similar triangles ABC and PQR are 36 cms and 24 cms respectively. If PQ = 10 cm then the length of AB is

A) 18 cm	B) 12 cm
C) 15 cm	D) 330 cm

Answer & Explanation Answer: C) 15 cm

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Q:

If $\frac{\sqrt{2 + x} + \sqrt{2 - x}}{\sqrt{2 + x} - \sqrt{2 - x}} = 2,$ then the value of X is

A) 4⁄5	B) 3⁄5
C) 8/5	D) 1/5

Answer & Explanation Answer: C) 8/5

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0 854

Q:

If ${(a + \frac{1}{a})}^{2} = 3,$ then the value of $a^{6} - \frac{1}{a^{6}}$ will be

A) 1	B) 3
C) 0	D) 2

Answer & Explanation Answer: C) 0

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Q:

The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is

A) 9	B) 18
C) 21	D) 27

Answer & Explanation Answer: C) 21

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Q:

$(2^{51} + 2^{52} + 2^{53} + 2^{54} + 2^{55})$ is divided by

A) 23	B) 58
C) 124	D) 127

Answer & Explanation Answer: C) 124

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Q:

If $\tan 45^{0} = c o t \emptyset, t h e n t h e v a l u e o f \emptyset, i n r a d i a n s i s$

A) π	B) π9
C) π2	D) π12

Answer & Explanation Answer: B) π9

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Q:

In $∆ ABC$ , ∠A = 90°, $AD ⊥ BC$ and AD = BD = 2 cm. The length of CD is

A) 3 cm	B) 3.5 cm
C) 3.2 cm	D) 2 cm

A) always zero	B) never zero
C) positive only if a ≠ b	D) positive if an only if a > b

For any two real numbers a and b.

$\sqrt{{(a - b)}^{2}} + \sqrt{{(b - a)}^{2}}$ is

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For any two real numbers a and b. a-b2+b-a2 is

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For any two real numbers a and b.

$\sqrt{{(a - b)}^{2}} + \sqrt{{(b - a)}^{2}}$ is