Have a question?
Message sent Close
LydiaMadini
@lydiamadini
Active Member
Topics: 0 / Replies: 11
Reply
7 months ago
Reply
New Question: Divisibility and Remainders

How many perfect squares less than 10000 are there whose last two digits end with 44?

7 months ago
Reply
7 months ago
Reply
7 months ago
Reply
RE: Divisibility and Remainders

Find the solution in detail As per Wilsons theorem when (n - 1)! is divided by p we will get a remainder of - 1 when p is a prime number. As per t...

7 months ago
Reply
RE: Divisibility and Remainders

@anna Please find the solution, Using Wilson's theorem, we get(41 - 1)! = 40! = -1mod41 = 40mod41=> 39! = 1mod41and let 38! = xmod41=> 39x ...

7 months ago
Reply
RE: Divisibility and Remainders

@anna Please find the soloution. n2 + 3n + 1 is a multiple of 3n + 10.=> (n2 + 3n + 1)/(3n + 10) is an integer.=> [(3n-1)(3n+10) + 19]/9*(3...

7 months ago
Reply
RE: Trailing Zeros

@anna Power of 5 in 1!*2!*3!*4!*5*................................*50! = 262. Thus number of zeros at the end of this num = 262.

7 months ago
Reply
RE: HCF and LCM

The pair will be (45a, 45b) where a and b will be co-prime to each other. Now 21600 = 25*33*52. To find a and b, we first take the factor of 45 from 2...

7 months ago
Reply
New Question: HCF and LCM

4 bells toll together ay 9 am. they toll after 7,8 11,12 seconds resp. how many times will they toll together again in the next 3 hrs.? a) 3 b)4 ...

7 months ago
Reply
RE: HCF and LCM

The numbers are 215, 167 and 135. The difference between the numbers (so that the equal remainder gets cancelled out) is - 48, 80, 32. Ans = HCF ...

7 months ago