1/X + 1/Y = 1/3....How many ordered pair (x.y) satisfy this.
For how many ordered pairs (a,b) where a,b are non-negative integers satisfy the following equation:
cube root a + cube root b = cube root of 4160
what is the value of n if value of n! = 3! *5!*7!
p is a prime number and m is a positive integer. How many solutions exist for the equation:
p^6 - p=(m^2 + m + 6)(p-1) ?
Hi sir, this is a question from CopyCat-3
My doubt is-- S(n) gives the sum of k and not digital sum, right? Had it been digital sum, then S(555) were equal to 6 and not 15, as stated in the question.
So, 2 digit number n where S(n)=5 can be only 14,23,32,41&50. How is S(59)=5?
If S(555)=15, then S(59) should be equal to 14 and not 5, right?
How many positive integral pairs of (x, y) satisfy y2 = x4 + x2 + 1?
1/a+1/b+1/ab=1/n, where a and b are prime numbers and n is a whole number. Find a^2+b^2+n^2
4. None of these
I got a and b as 2 and 3, and n=1, so the answer comes 14 which is none of these. But, the given answer is 6. How?
How many four digit positive integer divisible by 7 have property that, when the first and last digit is interchanged, the result is a (not necessarily four digit) positive integer divisible by 7?
all the page numbers from a book are added, beginning at page 1. However one page number was added twice by mistake. the sum obtained was 1000. Which page number was added twice?