CAT Exam

If a and b are positive integers such that 4a + 5b - 100 = 0, then find the total number of solutions.

Option
(1) 3
(2) 4
(3) 5
(4) 6

Read Solution (Total 2)

ans(2)
solns will be (5,16),(10,12),(15,8),(20,4)
10 years agoHelpfull: Yes(0) No(0)

Given 4a+5b-100=0,
substitute values for a and b, we get values as
a b
5 16
10 12
15 8
20 4
10 years agoHelpfull: Yes(0) No(0)

CAT Other Question

A function f(n) is defined as f(n) = (n - 1) (n) (n + 1). What is the remainder when f(n) is divided by 11 given that n = 1247?

Option
(1) 5
(2) 9
(3) 7
(4) 8 PQRS is a square, while diagonals PR and QS coincide with the x and y-axis respectively. Side PQ lies on the line x + y + 3 = 0.
Side RS lies on which of the following lines?
(1) x + y + 3 = 0 (2) x – y + 3 = 0 (3) x – y – 3 = 0 (4) None of these