Recent questions tagged easy

A fair coin is tossed 100 times. The probability of getting tails on odd number of times is

asked Jan 6, 2014 by thanvigandhi_1

1 answer

A line with direction ratio $(2,1,2)$ meets the lines $x=y+a=z\:\;and\:\:x+a=2y=2z$. The coordinates of the points of intersections are ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Find the equivalent capacitance :

asked Jan 6, 2014 by meena.p

1 answer

Let A,B,C be three equally likely and collectively exhaustive events. If the odds 8 : 3 against A, 5:2 against B then the odds against C are

asked Jan 6, 2014 by thanvigandhi_1

1 answer

Equivalent capacity of parallel plate capacitor shown below is :

asked Jan 6, 2014 by meena.p

1 answer

The probability of guessing correctly atleast 8 out of 10 answers on a true - false examination is :

asked Jan 6, 2014 by thanvigandhi_1

1 answer

In the circuit shown below ; if 2000 v potential is given to point A, the potential at point B is :

asked Jan 6, 2014 by meena.p

1 answer

Two dice are thrown, the probability that the sum of the points on the dice is 7 is

asked Jan 6, 2014 by thanvigandhi_1

1 answer

The plates of parallel plate capacitor of capacity $ 100 \mu F$ are charged to potential $100 v $and then seperated from each other so that distance between them is doubled. How much energy is spent in doing so ?

asked Jan 6, 2014 by meena.p

1 answer

Ram shares a photo link on facebook with 3 persons and requests each of them to share with 3 more persons and continue the chain. For every share of the photo link if Rs 100 is donated to the Adyar Cancer society, what is the total amount collected by the society till the $b^{th}$ set of shares.

asked Jan 6, 2014 by yamini.v

1 answer

Given $4$ numbers, the first $3$ numbers are in $AP$ and the last $3$ numbers are in $GP$. The $1^{st}$ and $3^{rd}$ terms add upto $2$ and the $2^{nd}$ and $4^{th}$ terms add to $17$. Find the numbers.

asked Jan 6, 2014 by yamini.v

1 answer

If $P(0,1,0)\:and\:Q(0,0,1)$ are two points in space, then the projection of $PQ$ on the plane $x+y+z=3$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

If $a, b, c$ are in $AP, a, x, b$ and $b, y, c$ in $GP$, what is the progression type for $x^2,b^2,y^2$?

asked Jan 6, 2014 by yamini.v

1 answer

Find the sum of the series upto 20 term 1+(1+2)+(1+2+3)+--------

asked Jan 6, 2014 by yamini.v

1 answer

Find the sum of 8 terms of the series whose $n^{th}$ term is given by $n^2+2^n$

asked Jan 6, 2014 by yamini.v

1 answer

For what value of n , the $n^{th}$ term of the GPs 2560,1280,640 ----- and 10,20,40 ------ are equal.

asked Jan 6, 2014 by yamini.v

1 answer

The first term of a $GP$ is $4$ and the sum of its $3^{rd}$ and $5^{th}$ terms is $360$. Find the common ratio.

asked Jan 6, 2014 by yamini.v

1 answer

Find three numbers in AP whose sum is 33 and the sum of whose squares is 395

asked Jan 6, 2014 by yamini.v

1 answer

Two cars start at a point A at the same time. The first car goes with a uniform speed of 100 Km/hr and the second car starts at 80 for the first hour and increases the speed by 10 km/hr every hour. After how much time does the second car overtake the first car, assuming these are no stops in between.

asked Jan 6, 2014 by yamini.v

1 answer

Distance of a point $P(\overrightarrow c)$ from the the line $\overrightarrow r=\overrightarrow a+\lambda \overrightarrow b$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Given an AP, if the sum of first 5 terms is 175 and the sum of first 10 terms is 700, find the sum of the first 7 terms.

asked Jan 6, 2014 by yamini.v

1 answer

Find the sum of all natural numbers between 45 and 300 that are exactly divisible by 7.

asked Jan 5, 2014 by yamini.v

1 answer

How many 3 digit numbers leave a remainder of 2 when divided by 7 ?

asked Jan 5, 2014 by yamini.v

1 answer

How many 3 digit numbers are divisible by 5?

asked Jan 5, 2014 by yamini.v

1 answer

How many two digit numbers are divisible by 4?

asked Jan 5, 2014 by yamini.v

1 answer

Which term of the sequence 130,126,122----- is the first negative term.

asked Jan 5, 2014 by yamini.v

1 answer