Homework Help: math

Posted by Anonymous on Monday, April 21, 2008 at 8:03pm.

I have an SAT Question of the Day that I'm having trouble with. The question is: Seven cards in a pile are numbered 1 through 7. One card is drawn. The units digit of the sum of the numbers on the remaining cards is 7. What is the number on the drawn card?
The answer choices are:
1
3
5
6
7

math - Reiny, Monday, April 21, 2008 at 8:24pm
The sum of 1+2+..+7 = 28

If after removing a card the unit digit of the sum of the remaining is 7, that sum could be either 27 or 17

For the 17, the card removed had to be a 10, not possible.

So the card removed was a 1
for the
math - anonomous, Tuesday, April 22, 2008 at 10:16pm
i dont know bcuz im only n da 6th grade

Answer this Question

Related Questions

math - Katie had a pack of twenty four cards numbered 1- 24. She arranged the ...
english - I'm having trouble understanding how to answer this question about...
stats - a box contains 100 cards, of which 25 are numbered 1, 35 are numbered 2...
4th Grade Math Correction - PLEASE HELP.I am sorry. I posted the question wrong ...
french yr8 - im having a bit of trouble with my homework. i`m learning about ...
math - a set of cards is numbered 1-20 what is the probability of choosing the ...
4th gr math - Algebra question....Find the missing number. Tell which property ...
strayer - You are playing Guess Your Card with three other players. Here is what...
logic application - You are playing Guess Your Card with three other players. ...
statistics - The red face cards and the black cards numbered 2-9 are put into a ...

For Further Reading

First Name:
School Subject:
Answer: