Find the quadratic equations whose roots are the r | Mathematical Operations Questions & Answers

Q:

If Q means 'add to', J means 'multiply by', T means 'substract from' and K means 'divide by' then 30 K 2 Q 3 J 6 T 5 = ?

A) 18	B) 28
C) 31	D) 103

Answer & Explanation Answer: B) 28

Explanation:

Using Correct Symbols , We have :

Given expression = 30 / 2 + 3 x 6 - 5 = 15 + 18 - 5 = 28

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107 12141

Q:

Find out the two signs to be interchanged for making following equation correct

5 + 3 x 8 - 12 / 4 =3

A) + and -	B) - and /
C) + and x	D) + and /

Answer & Explanation Answer: B) - and /

Explanation:

On interchanging - and /, we get the equation as

5 + 3 x 8 / 12 - 4 = 3

or 5 + 3 x (2/3) - 4 = 3

or 3 = 3, which is true.

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419 35012

Q:

If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and-stands for 'division', then 20 × 8 ÷ 8 - 4 + 2 = ?

A) 80	B) 25
C) 24	D) 5

Answer & Explanation Answer: C) 24

Explanation:

By the Given data , We have the expression:

20 + 8 - 8 ÷ 4 × 2 = 20 + 8 - 2 × 2 = 20 + 8 - 4 = 24.

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235 16589

Q:

Given intercharges :

Signs + and x and numbers 4 and 5.

A) 5 x 4 + 20 = 40	B) 5 x 4 + 20 = 85
C) 5 x 4 + 20 = 104	D) 5 x 4 + 20 = 95

Answer & Explanation Answer: C) 5 x 4 + 20 = 104

Explanation:

On interchanging + and x and 4 and 5 in (c),

we get the equation as
4 + 5 x 20 = 104 or 104 = 104, which is true.

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188 15726

Q:

Given interchanges :

Signs + and - , numbers 4 and 8.

A) 4 + 8 - 12 = 12	B) 4 - 8 + 12 = 0
C) 8 + 4 - 12 = 24	D) 8 - 4 + 12 = 8

Answer & Explanation Answer: B) 4 - 8 + 12 = 0

Explanation:

On interchanging + and - and 4 and 8 in (b),

we get the equation as

8 + 4 - 12 = 0
or 12 - 12 = 0
or 0 = 0, which is true.

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372 35420

Q:

If × means ÷, - means ×, ÷ means + and + means- than (3 - 15 ÷ 19) × 8 + 6 = ?

A) 8	B) 4
C) 2	D) -1

A) A	B) B
C) C	D) D

Find the quadratic equations whose roots are the reciprocals of the roots of $2 x^{2} + 5 x + 3$ ?

A) $3 x^{2} + 5 x + 2 = 0$

B) $5 x^{2} + 3 x + 2 = 0$

C) $3 x^{2} - 5 x - 2 = 0$

D) None

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Find the quadratic equations whose roots are the reciprocals of the roots of 2x2+5x+3? A) 3x2+5x+2=0 B) 5x2+3x+2=0 C) 3x2-5x-2=0 D) None

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Find the quadratic equations whose roots are the reciprocals of the roots of $2 x^{2} + 5 x + 3$ ?

A) $3 x^{2} + 5 x + 2 = 0$

B) $5 x^{2} + 3 x + 2 = 0$

C) $3 x^{2} - 5 x - 2 = 0$

D) None