[Suraj_P]

Hi,

ab = 10a + b

10a is even.

b+1 is div by 4 --> b is odd.

so even + odd = odd

So only ii is enough to answer

[bhars18]

ab = 10a + b

Aha...! Never thought of this perspective . I always assumed ab was the product of a and b and not as two digits of the number. I guess it cannot be assumed unless specified

Bharathi.

[arps]

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[Absolutely Agent]

Originally Posted by arps

I know some of my question are dumb but ....er....well, I am dumb too.

Please show me how to solve this DS question.

Given that x and Y are non-negative. What is the value of X?

I 2X+2Y<= 40 II X-2Y >=20

Statement 1 -

2x+2y<=40
that is x+y<=20

(5+15=20 , 8+12=20..... )
so nothing can be said abt the value of x

Statement 2 -

x-2y>=20

(30-2*5=20,40-2*9=22)
so nothing can be said abt the value of x

now combining both the statements .....
we know that both x,y are non negative
and still
x+y = 20 (limiting case ...drop the < sign)
x-2y = 20(limiting case ....drop the > sign)

we now x = 20 and y = 0
no other solution will satisfy ....u can have a try
so the answer is 3 ( i.e we have to use both the statements to get the answer)

HTH
Gautam

[arps]

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