I want a maths puzzle with answer ?

Question

simple one,
so that my brother will show it to his Mam .He was studying in vii ..

Answer 1

You go into a dark room and need to pull out a matching pair of socks from your sock drawer; unfortunately, all the socks are unsorted and randomly mixed up inside. You have five different kinds of socks in your drawer: white, black, green, blue, red. Question: how many individual socks do you need to pull out before you are guaranteed to have a match--remember, the lights are off, so you cant' see.

Answer: six, because, in theory, it is possible that the first five socks were one of each; in this case the next sock would have to be a match to one of the first five.

You could modify this problem by changing the five to any other number; the answer to the puzzle would just be that number plus 1.

Answer 2

It's simple.You are given to use numbers only from 1 to 9 and you should write a 3*3 matrix such that the sum of three consecutive numbers in any angle is equal.
Ans:-
8 1 6
3 5 7
4 9 2
Here the sum of three consecutive numbers in any direction is equal i.e 15. i.e 8+5+2=15.
9+1+5=15
Similarly you may verify the other numbers.

Answer 3

What is 1+1? It is not 11 but 2.

You can try othr variants of the same puzzle also. It is pretty versatile and time tested.

Answer 4

its actually a logic question
there r 3 boxes with coloured balls in each
1 has red balls
1 has white balls
1 has balls of both colours
the labels of all the boxes get mixed
now u have to take just one ball out of one box to find the correct colours?

well the answer is that
u take out 1 ball from the box which has been labelled mixed balls by mistake
supposing the ball is white
the box is sure to have coloured balls of just one colour
therefore it contains white balls
now the remaining two boxes
the box which had been labelled white will have red balls because if it had had mixed balls the third box would have been labelled correctly
and when it has red balls the third box will surely have mixed balls

i hope u got what i explained
and it should be right level for class 7

Answer 5

u should use eight 8 and ur ans must be 1000.how is it possible?
here comes the ans

888
*88
**8
**8
**8
1000

the * represents space

u hve to add in this way.how is this.



bye.good luck(4 ur brother)

Answer 6

I want the sum 1000 using 9 9s..

Answer 7

given in basic terms this recommendations you could no longer sparkling up by using fact the uppercase "T" isn't blanketed in any of the above relationships. subsequently, whether "e" would desire to be defined the sum of T + e would nevertheless be undefined.

Answer 8

Try this site:

http://www.cut-the-knot.org/games.shtml

Answer 9

(a+b)=(a*b)
The above Identity is true when value of b=a/(a-1)

Answer 10

TRY www.mathsnet.net