What is the distance between a and b on the number line?
(1) a – b = 6
(2) ab > 0
Modulus
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IMO C
1) not suff
a=13, b=7
a=20,b=14
2) not suff.
a and b can take any values as long as both are negative or both are positive
combined
the distance between them is 6
1) not suff
a=13, b=7
a=20,b=14
2) not suff.
a and b can take any values as long as both are negative or both are positive
combined
the distance between them is 6
The powers of two are bloody impolite!!

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would go with C
stmnt 1. a – b = 6
let a and b be on either sides of 0 on the number line
let a=10, b=4 distance between a and b is 14 (10+4)
let a and b be on the same side (both +ive or both ive)
say a=10, b=4 distance between a and b is 6 (106)
not sufficient
stment 2. ab > 0
=> either a and b both are positive or a and b both negative
=>a and b on the same side
no values are given, cant find distance.
not sufficient
combining, a and b on the same side
distance between a and b must be 6
hence, C
stmnt 1. a – b = 6
let a and b be on either sides of 0 on the number line
let a=10, b=4 distance between a and b is 14 (10+4)
let a and b be on the same side (both +ive or both ive)
say a=10, b=4 distance between a and b is 6 (106)
not sufficient
stment 2. ab > 0
=> either a and b both are positive or a and b both negative
=>a and b on the same side
no values are given, cant find distance.
not sufficient
combining, a and b on the same side
distance between a and b must be 6
hence, C