Recent questions tagged class11

The sink for dead plants and animals is

asked Jan 20, 2014 by sreemathi.v

1 answer

Let $S_{1}, S_{2}$....be the squares such that for each $n\geq\;1$, the length of side of $S_{n}$ = length of diagonal of $S_{n+1}$. If side of $S_{1}$ is 20 cm, the smallest value of n such that area of $S_{n}\;<\;2$ is

asked Jan 20, 2014 by yamini.v

1 answer

Identification of a pollutant as organic ,inorganic (or) organometallic origin is called

asked Jan 20, 2014 by sreemathi.v

1 answer

Which of the following gas responsible for Bhopal gas tragedy

asked Jan 20, 2014 by sreemathi.v

1 answer

Composition of PAN is

asked Jan 20, 2014 by sreemathi.v

1 answer

If $a, b, c$ are in AP and $a^2$, $b^2$, $c^2$ in GP, and $a+b+c=\frac{3}{2}$, then value of $c$ is

asked Jan 20, 2014 by yamini.v

1 answer

Gradual warming of the atmosphere due to trapping of radiation of long wavelength is called

asked Jan 20, 2014 by sreemathi.v

1 answer

Identify the correct statement

asked Jan 20, 2014 by sreemathi.v

1 answer

If $(1+3+5+....+p)$+$(1+3+5+....+q)$ = the smallest value of $p+q+r, (p>6)$ is

asked Jan 20, 2014 by yamini.v

1 answer

Three samples of water A,B and C have the D.O levels of 4ppm,and 3.8ppm and 2.1ppm respectively the most polluted sample of water is

asked Jan 20, 2014 by sreemathi.v

1 answer

In which region of atmosphere,lowest temperature are observed?

asked Jan 20, 2014 by sreemathi.v

1 answer

Sum of series $S$ = $\frac{1}{2}$+$\frac{1}{3}\;(1+2)$+$\frac{1}{4}\;(1+2+3)$+$\frac{1}{5}\;(1+2+3+4)$+......upto 20 terms is

asked Jan 20, 2014 by yamini.v

1 answer

Which of the following is most toxic?

asked Jan 20, 2014 by sreemathi.v

1 answer

Which of the following is primary pollutant?

asked Jan 20, 2014 by sreemathi.v

1 answer

Sum of series $1^2$-$2^2$+$3^2$-$4^2$+$5^2$+.....+$1001^2$ is

asked Jan 20, 2014 by yamini.v

1 answer

Which of the following is primary pollutant(s)

asked Jan 20, 2014 by sreemathi.v

1 answer

Identify the secondary pollutant among the following

asked Jan 20, 2014 by sreemathi.v

1 answer

If the $\;10^{th}\;$ term of a $GP$ is $9$ and the $\;4^{th}\;$ term is $4$, then the $\;7^{th} \;$term is

asked Jan 19, 2014 by yamini.v

1 answer

In an AP, the $\; 4^{th}\;$ term is $36$. The$\; 21^{st}\;$ term is $108$ more than the $\;9^{th}\;$ term. What is the first term a and the common difference $d$?

asked Jan 19, 2014 by yamini.v

1 answer

Which is logically equivalent to "If today is Sunday, Matt cannot play hockey."?

asked Jan 18, 2014 by thanvigandhi_1

1 answer

Which statement is logically equivalent to "If Yoda cannot use a lightsaber, then he cannot help Luke win the battle."

asked Jan 18, 2014 by thanvigandhi_1

1 answer

"If Tom buys a red skateboard, then Amanda buys green in-line skates." Which statement below is logically equivalent?

asked Jan 18, 2014 by thanvigandhi_1

1 answer

Mary says "The number I am thinking is divisible by 2 or it is divisible by 3". This statement is false if the number Mary is thinking of is

asked Jan 18, 2014 by thanvigandhi_1

1 answer

The statement "If x is divisible by 8, then it is divisible by 6" is false if x equals

asked Jan 18, 2014 by thanvigandhi_1

1 answer

Which of the following options indicate the correct contrapositive and converse respectively of the Statement- “Something is cold implies that it has cold temperature.”

asked Jan 18, 2014 by thanvigandhi_1

1 answer

Which of the following options indicate the correct contrapositive and converse respectively of the Statement: If x is a prime number, then x is odd.

asked Jan 18, 2014 by thanvigandhi_1

1 answer

The sum of 0.2, 0.22, 0.222, 0.2222.....till n terms is given by

asked Jan 18, 2014 by yamini.v

2 answers

Which of the following statements do not convey the same meaning as the statement-A “If a natural number is odd, then its square is also odd.”

asked Jan 18, 2014 by thanvigandhi_1

1 answer

The sum of $n$ terms of an arithmetic progression is $\;n\;(2n-1)$. What is the $m^{th}$ term of the series?

asked Jan 18, 2014 by yamini.v

1 answer

If a, g and h are the AM, GM and HM respectively of two positive numbers x and y, then identify the correct statement.

asked Jan 18, 2014 by yamini.v

1 answer

The sum of n terms of two APs is in the ratio$\; 5n + 1: 4n+10$. Find the ratio of their $\;5^{th}$ terms.

asked Jan 18, 2014 by yamini.v

1 answer

The number of terms in the AP a, b,....c is

asked Jan 17, 2014 by yamini.v

1 answer

A train travels from A to B at speed of x km/hour and from B to A at speed of y km/hour. The average speed of the train from A to B and back to A, would be calculated by the

asked Jan 17, 2014 by yamini.v

1 answer

If three numbers are in GP, then their logarithms will be in

asked Jan 17, 2014 by yamini.v

1 answer

The sum of three decreasing numbers in AP is 27. If -1, -1, and 3 are added to them respectively the resulting series is in GP. The numbers are

asked Jan 17, 2014 by yamini.v

1 answer