MBA Exam

How many pairs of natural numbers are there, the difference of whose squares is 39?

1) 1
2) 2
3) 3
4) 4

Read Solution (Total 2)

2 pairs 20,19 8,5
9 years agoHelpfull: Yes(0) No(0)

2 pairs..
let, b^2-a^2=39
(b-a)*(b+a)=39
so,
(8,5) and (20,19)
9 years agoHelpfull: Yes(0) No(0)

MBA Other Question

Find the sum of all the real values of x that satisfy the equation:{243^(log (base 81) x)} - 2x = {2^(log (base 16) x + 2} - 8.

1) 16
2) 20
3) 12
4) 18
5) NOT
Find the number of zeros in the product 1^1*2^2*3^3..............................100^100. kindly post solution as well

1) 1200
2) 1300
3) 1050
4) 1225