let k be an integer such that sum of its digits of k is 4 and 10^5
easy one !
How many three-digit numbers are there, such that if one of the digits is 8, the following digit is 9?
666
665
17
19
An escalator has 'N' steps. A person needs to take 'x' steps to reach the other end of the escalator if he starts moving in the direction of its movement, whereas he needs to take 'y' steps to reach the other end if he starts moving in the opposite direction. Natural numbers 'x', 'N' and 'y' (in that order) are in
a Arithmetic Progression
b Geometric Progression
c Harmonic Progression
d None of these
the number of positive integer pairs (a,b) for which 1/a + 1/b = 1/10 ?
please explain
there are 10 points in a plane of which 4 are collinear how many triangles can be formed using any of these 3 points as vertices???
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How many points with integer co-ordinates lie inside the triangle whose vertices are (0, 2), (–5, –3) and (5, –3)?
I am nt able to do frm graph..any oder way to approach such questions?
If the roots of the equation x3 – ax2 + bx – c = 0 are three consecutive integers, then what is the smallest possible value of b?
Find the value of k so that sum of the squares of roots of equation x^2 – 8x + k = 0 is 30.
Lets consider all irreducible fractions below 1, of type p/q where q=99 and p/q is positive. If S denotes the sum of all such fractions denoted by p/q, then the value of S is best represented by
A. 45
B.40
C.50
D.30
alok wnt to a casino to play a card game.he playd 10 rounds of dat game and in each round he doubled his amount and then he gve Rs.x to his frd. aft playing 10 rounds he had Rs1023. fnd d sum of d digits of d least possible value of x?
options are 5,6,7,8?
Kiran has to pay Rs 7282 at the end of the 3 years.He agrees to repay the amount in three annual installments. Initially the interest rate in the scheme is 10% pa compounded annually , but after 2 installment rate is increased to 15% p.a. ,effective from that year. What was the value of the last installment?
Approach Please guys ...
hey.. i have a basic doubt here.. can anyone explain the concept behind - if 'n' is the average of a set of numbers.. and a random number is removed from the set.. then what can/cannot be the new average..
Two circles with radii 15 cm and 20 cm intersect at two points A and B. What is the positive difference between the non common areas of two circles ?
Let abcd be a four digit number such that abcd + bcda + cdab + dabc = 32219. How many such four digit numbers 'abcd' are possible?
How many five digit numbers can be formed, with first digit as 1 and last digit as 5, which are not divisible by 3?
The three words "ALL IS WELL" are flashed such that the words, individually, are switched on at regular intervals of 4, 7 and 9 seconds respectively and after they are switched on, the words are switched off after 2 seconds, 4 seconds and 5 seconds respectively. If at time x, all the words happened to switch off simultaneously, find the least time after x when all three words will switch on simultaneously.
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Please give approach
A, B and C can independently do a work in 15, 20 and 30 days respectively. they work together for some time after which C leaves. a total of Rs. 18000 is paid for the work and B gets Rs. 6000 more than C. for how many days did A work?
can anyone solve this for me
- 8 days
- 2 days
- 4 days
- 6 days
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In a school there s an increase in number of admissions every yr. The number of students in yr 2000 is 780 and it increased to 3000 in the yr 2005. Find the annual increase? approach too ?
- 39
- 25
- 31
- 20
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