pratikshr wrote:

If the symbols Δ and ◊ each represent digits in the following subtraction operation, what is the value of ◊?

Δ ◊ ◊

- Δ Δ

6 6 7

A. 3

B. 4

C. 5

D. 8

E. 9

Let's say Δ = x and ◊ = y. As you see we substract both times y-x but get 7 and 6 below, that means we had to borrow 1 by the first substraction. That also means that we need to borrow 1 also from x --> means x=6+1=7 and y+10-x=3, so y=x-3 = 7-3=4

Answer B

_________________

When you’re up, your friends know who you are. When you’re down, you know who your friends are.

Share some Kudos, if my posts help you. Thank you !

800Score ONLY QUANT CAT1 51, CAT2 50, CAT3 50

GMAT PREP 670

MGMAT CAT 630

KAPLAN CAT 660