a qun

What we are given is:
a line of fixed length

we have to make it shorter without cutting it or rubbing it..
We can't perform any type of operation on it and we have to reduce it's length.

323 = 40320 and131 = 120 andthen727 = ?

131 : 1+3+1=5 and 5!=120.

323: 3+2+3=8 and 8!=40320.

now, i hope you know what should be 727?

7+2+7=16 and your ans is 16!.

no of integral solution of x1*x2*x3*x4*x5=1050 is?

first find it's factors: 1050 = 2*3*5*5*7

Now, as we can change the values between different xs.

Soo, we get ans: 5!

but we have two 5s. That's why, ans is 5!/2! = 60.

number basics

if I ask you, does -3 divides 18??
what would you say:

The answer is yes.
So, the basic definition is :
Let a, b be integers. Then a divides b (equivalently: a is a divisor of b, or a is a factor of b) if there exists an integer c such that b = ac

interesting qun .. generally asked in interviews

Qun: We are given four zeros and using any mathematical operation we have to make 24.
Well, those who really want to know the answer csn scroll down and others who want to give it a try, better turn on to the next post..
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So I have 3-4 answers to it.
1) (0!+0!+0!+0!)! (0!=1)
2) (Cos0 + Cos0 + Cos0 + Cos0)!
3) (Sin0)! adding four times as in first.
4) (tan0)! same as above.