Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi bobbym and anonimnystefy,

The answers 19 and 20 are correct. Well done!

21. The Standard Deviation of a set of 10 numbers is 5. When each number is added by 7, the new Standard Deviation is ______________.

(a) 12

(b) 7

(c) 5

(d) None of these.

22. The probability of getting a black card from a pack of cards is ______________.

(a) 1/13

(b) 2/13

(c) 1/4

(d) 1/2

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi bobbym and anonimnystefy,

Both the answers are correct, bobbym! Well done!

anonimnystefy : The answers

and23. The common ratio 'r' in the Geometric Progression 9, 3, 1, ........ is _______________

(a) 3

(b) 1/3

(c) 1

(d) 9

24. The value of

is(a)

(b)

(c)

(d) None of these

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Question #22 wasn't precise.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi anonimnystefy and bobbym,

Both the answers are correct. Well done!

25. Volume of hemisphere with radius 4 centimeters (in cubic centimeters) is ___________________

(a)

(b)

(c)

(d) None of these

26. When

is divided by x - 2, the remainder is 20 then the value of m is __________________(a) 4

(b) -4

(c) 3

(d) 2

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi anonimnystefy and bobbym,

The answers 25 and 2 are correct. Well done!

27. The roots of the equation x[sup]2[/sup] - x - 6 = 0 are __________________

(a) 3,2

(b) 3,-2

(c} -3,2

(d) -3,-2

28. Which of the following is a point on 3x + 4y ≤ 7?

(a) (1,1)

(b) (1,2)

(c) (2,1)

(d) (0,2)

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi bobbym and anonimnystefy,

The answers 27 and 28 are correct. Well done!

29. The points of intersection of the lines x = 3 and y = 4 is _________________

(a) (3,0)

(b) (4,0)

(c) (0,0)

(d) (3,4)

30. The equation y = c represents a _________________

(a) x axis

(b) y axis

(c) a line parallel to x axis

(d) a line parallel to y axis

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi bobbym and anonimnystefy,

bobbym : Well done!

anonimnystefy :

31. P(E) + P(E') = ____________

(a) 0

(b) 1

(c) 2

(d) None of these

32. When A and B are mutually exclusive,

= ______________(a) P (A)

(b) P (B)

(c) P (A) + P (B)

(d)

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Yes it was. I don't know how that happened.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi anonimnystefy and bobbym,

The answers 31 and 32 are correct. Well done!

33. If

= , then = ________________(a) 1

(b) 0

(c)

(d)

*Last edited by ganesh (2012-06-25 18:12:57)*

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 106,410

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.****No great discovery was ever made without a bold guess. **

**Online**

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

You gave me so much trouble with this one. I though you had written theta=cos(theta).

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

Hi bobbym and anonimnystefy,

The answer 33 is correct. Well done!

(Sorry for the trouble, anonimnystefy)

34.

is(a)

(b)

(c)

(d)

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,730

35. The Common Difference in the Arithmetic Progression 5, 2, -1, ..... is _______________.

(a) 3

(b) -3

(c) 2

(d) -2

36.

___________________(a)

(b)

(c)

(d) None of these

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

Hi ganesh

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline