Number Systems, Progressions

Let A = set of all divisors of 8100 and B = set of all divisors of 21600. What is the product of the elements of AUB?
  • Very lengthy answer…None of the above.

0 voters

Let A = set of all divisors of 8100 and B = set of all divisors of 21600. What is the product of the elements of AUB?

  • Very lengthy answer.None of the above

0 voters

Find a four-digit number abcd with distinct digits which is divisible by 4, such that bacd is divisible by 7, acbd is divisible by 5, and abdc is divisible by 9.
  • Post ur answer

0 voters

If (24)k is a factor of 5! × 10! × 15!, what is the largest possible integer value of k?
  • 5
  • 4
  • 11
  • 7

0 voters

Find the product of all the factors of 3^16
a) 3^33 b) 3^68 c) 3^136 d) 3^128
  • a
  • d
  • c
  • b

0 voters

for which of the following n is the number 274 +22058+22n is a perfect square?
a)2012 b)2100 c)2011 d)2010
  • b
  • d
  • c
  • a

0 voters

From a no series a student deletes a no and finds that the average of remaining no's is 35+7/17. find how many no's were there originally and which no was deleted?
koi isko....fully...samjaye..i can't get approach....!!

how many natural numbers are there with 24 factors where 2,3 and 5 are the only prime factors?

  • 12
  • 36
  • 27
  • 9

0 voters

how many triangular no's less then 1000 have the property that they are the difference of squares of two consecutive natural no's ?


no OA ! plz share approach
  • 22
  • 20
  • 23
  • 21

0 voters

how many factors of 6^10 are integral multiples of 6^5?

  • 6
  • 25
  • 36
  • 9

0 voters

two numbers have their hcf equal to lcm.which of the following must be true?

  • two numbers are prime
  • two numbers are coprime
  • two numbers are equal
  • none of these

0 voters

given that p,q, and r are positve integers satisfying p^2 q^3 r^4=2^28 3^3. the minimum possible value of p+q+r is

  • 36
  • 54
  • 27
  • 18

0 voters

What is the rightmost non-zero digit of 37! ?

if n is an integer then how many values of n will have an integral value of (16n^2+7n+6)/n

  • 3
  • 2
  • 4
  • none of these

0 voters

62^13 - 45^13 + 64^13 - 47 ^ 13 divided by 34 ..remainder ?

plz explain also ..thanx
  • 7
  • 32
  • 16
  • 0

0 voters

Find the value of

1+a^2-b^2/(a-b) + a^3-b^3/(a-b) + ..... +a^9999-b^9999/(a-b)

a and b are the roots of the equation x^2=1


  • 1
  • 9999
  • 5000
  • 4999

0 voters

The sequence 1, 2, 4, 5, 7, 9, 10, 12, 14, 16, 17,…. has one odd number followed by the next two even numbers, then the next three odd numbers followed by the next four even numbers and so on. What is the 2003rd term of the sequence?
  • 3953
  • 3943
  • 3940
  • 3950

0 voters

In how many ways can 1000 be written as a sum of 'n' consecutive natural numbers, where 'n' is greater than 1?
  • 0
  • 1
  • 2
  • 3

0 voters

What is the least number of cuts required to cut a cube into 84 identical pieces, assuming all cuts are made parallel to the faces of the cube?
  • 11
  • 10
  • 13
  • 12

0 voters

How many 5 - digit numbers, comprising only the digits 4 and 5 are divisible by 3?

guys please post ur approach....
  • 11
  • 10
  • >12
  • 12

0 voters