S is a set of four-digit numbers formed using the digits 5, 6, 7 and 8 using each digit only once. M is a subset of S that contains numbers whose tens place digit is a prime number. What is the sum of all the numbers in M?
Is there a general formula for this??
Guys i am facing problems in these questions:- They are straightforward i guess but i still can't understand the logic behind them
Q What is the remainder when 56785678.... upto 1000 digits is divided by 99 ? What is the logic behind making two groups of 56*250 and 78*250 ?
Q Find the remainder when 468468.... upto 333 digits is divided by 1001 ?
Please explain the logic used in solving these questions
In a ∆ PQR, PQ=QR , angle PQR = 90° and S and T are points on PR such that PS^2 + TR^2 = ST^2 then angle SQT = ?
a. 30
b. 45
c. 60
d. 75
A man starting from point P takes six equal steps.each step is in one of the four directions - east west north south.what is the no of ways in which man ends up at point p after 6 steps?
the first 50 natural numbers one after another on a black board. He then carried out the following procedure 49 times. In each instance, he erased two numbers, say p and q and replaced them by a single number p +q - 1. Find the final number left on the board.
If a = 26^25 and b = 2*4*6*8.........*50, which of the following is true ?
1 a>b
2 b>a
Any shorter method for this ?
Can anyone share the schedule for AIMCATs?
kindly tell me the approach for solving following question
41^77 is divided by 7 find the remainder
Hi guys in the last questions of this below post (straight line division)
http://cat100percentile.com/2013/01/23/weighted-averages-3/ the answer is (11, -5). But if we use direct formula (13*1+1*5)/(5+1), (-8*1+10*5)/(5+1)=(3, 7). where am I doing wrong
A number of candidates were called for an interview and from these candidates three will be chosen. On the stipulated day, except two, all were present. If you make a team of three candidates from those who were present on that particular day, the probability that your team will be chosen by the board is 1/20, find the number of candidates who were called for the interview
In an exam , the average was found to be x marks. After deducting computational error , the average marks of 94 candidates got reduce from 84 to 64 . The average thus came down by 18.8 marks . The number of candidates who took exam where?
0 voters
How many factors of 67000 are above 1000 ?
How many words can be formed with the letters of the word 'MATHEMATICS' if no two vowels occupy consecutive places?
Please can someone tell me the approach. A bit confused since there are repetitions
The number of integral values of x that satisfy | |x − 6| − |x + 3| | ≤ 5?
Please share the shortest approach
In a polygon of side N what is the number of triangles formed joining the vertices having only 1 side in common with that of the polygon?
A bag contains 100 red balls and a certain number of green balls. Two persons A and B draw a ball one by one with replacement. The first one to draw a green ball is the winner. A picks up the ball first and we also know that because of this A is three times more likely to win. Find the number of green balls.
F(x) is a fourth order polynomial with integer co-efficients and with no common factors.The roots of F(x) are -2,-1,1,2.If p is a prime number greater than 97,then the largest integer greater that divides F(p) for all values of p is:
A.72
B.120
C.240
D.360
E.None of the above
A bag contain 8 red and 4 green balls find probability that 2 balls are red and one balls is green when 3 balls are drawn at random. (Just wanna know why its not 12C3 in solution but 12C4) ???
Zero and negative Integers can be even or odd ?
Given x: y = a: b = 1: 5 then the value of (x2 + a2)/ (y2 + b2) is