On a Christmas eve 10 families, each comprising of 4 members, bring along a card with each of them. Each member shares a card with the member of the other family exactly once. How many cards were exchanged during the event?
Can someone solve these 2 sums (with explanation plz)-->
1) A man decides to invest a certain amount of money in a savings account of a bank that pays 20% compound interest per annum for a period of two years. In return the man wanted payments of Rs. 200 at the end of first year and Rs. 400 at the end of second year from the bank. What is the sum of money that should be invested by the man to achieve this? (Ans- 4000/9)
2) A cubical container A of side 6 is filled with water. Another cubical container B of side 4 is filled with milk and a third cubical container of side 10cm is empty, The first container is tilted such that the water level coincides with the plane formed by joining the bottom side and top side of the opposite faces of the container (Mainly, don't understand this part!!!!). The water that spills over is poured into the third. The same is done with the 2nd container and the milk that spills over is poured into the third. What is the ratio of water to milk in the 3rd container?
There are nine three digits numbers with distinct units digits.Each number is reversed and the reversed number. Is subtracted from the original number.
The results were found to have an average of 0.
If each number, the hundreds digit is not less than its units digit.
Find the average of the hundreds digits of greatest and least numbers????
Approach plzz guyz
76 C 38 mod 8
rem?
A man can take a step forward, backward, left or right with equal probabilities. Find the probability that after nine steps he will be just one step away from his initial position.
A. 3696/7^4
B. 3969/4^7
C. 3696/4^7
D. 3969/7^4
2^800! when divided by 800 what is the remainder?
what is the remainder when 12341234....400 terms is divided by 909.
find the coeffcient of x^6 in the expansion of
(1+x/1!+x^2/2!+x^3/3!+x^4/4!+x^5/5!)^2
|x| + |2y| + |3z| = 13, x * y * z is non-zero; x, y, z are all integers. How many sets of values are possible
The sum of the factors of a number is 124. What is the number?
- Number lies between 40 and 50
- Number lies between 50 and 60
- Number lies between 60 and 80
- More than one such number exists
How many numbers are there less than 100 that cannot be written as a multiple of a perfect square greater than 1?
- 61
- 56
- 52
- 65
If a three digit number 'abc' has 2 factors (where a, b, c are digits), how many factors does the 6-digit number 'abcabc' have?
- 16
- 24
- 18
- 30
What is the no. of integral solutions possible for x^2-3*y^2 = 1376?
1. 9
2.11
3.22
4.55
5.Not Possible
.
Hcf is 90, product of numbers is 97200.. Find how many pairs??
In order to travel a certain distance,when the speed reduces by 2 m/s (from the usual speed) time taken increases by 10 s and when the sped reduces by 3 m/s (from the usual speed), time taken increases by 18 s. Find the usual speed, time and distance . (Can it be solved without equations ?)
If x and y are positive integers satisfying 17x+8y=3051,find the sum of the maximum and minimum differences between values of x and y?
(232323.......100 digits)^4234 mod 4, find remainder. The given number is in base 5.
find the remainder of 2^56 divided by 24 (not by using pattern method ) .
What is the remainder when (13^100 + 17^100) is divided by 25?
Ans is 2..Approach?