Brain Teasers

JaneFairfax · 2009-01-03 23:52:50

Jai Ganesh · 2009-01-04 00:03:10

Answer to #131:-
Absolutely right, Janefairfax!

#132. A polygon has 44 diagonals. How many sides does it have?

JaneFairfax · 2009-01-04 00:22:09

Jai Ganesh · 2009-01-04 01:08:15

Answer to #132:
You are correct, Janefairfax!

#133. There are 7 men and 3 ladies. Find the number of ways in which a committee of 6 prsons can be formed if the committee is to have atleast 2 ladies.

JaneFairfax · 2009-01-04 01:53:52

Jai Ganesh · 2009-01-04 03:11:57

Answer to #133:-
You are correct, JaneFairfax!

JaneFairfax · 2009-01-04 04:44:11

Last edited by JaneFairfax (2009-01-04 04:45:40)

Jai Ganesh · 2009-01-05 01:55:08

Answer to #127:-
Correct, JaneFairfax!

Jai Ganesh · 2009-01-05 03:08:45

#133. The number of rectangles excluding squares from a rectangle of 9 x 6 size is _______.

#134. Out of 18 points in a plane, no three points are in the same straight line except five points which are collinear. Find
(i) the number of straight lines
(ii) the number of triangles which can be formed by joining them.

Jai Ganesh · 2009-01-05 03:18:27

#135. Let

.
Add all the digits of the resulting value, assume you get a value n.
Add all the digits of n, assume you get a value n'.
Add all the digits of n', assume you get n''.
Continue this process until you get a single digit.
What is the number you would get?

careless25 · 2009-01-06 08:19:07

Last edited by careless25 (2009-01-06 08:19:17)

careless25 · 2009-01-06 08:41:50

JaneFairfax · 2009-01-06 08:48:03

careless25 · 2009-01-06 08:50:03

JaneFairfax · 2009-01-06 12:04:38

Jai Ganesh · 2009-01-06 20:58:41

Answers to #104, #105, #106, #107, and #108:
All correct, other than #108.
careless25,

Jai Ganesh · 2009-01-06 21:22:14

Answers to OOO : #94, #95, #96, #97, #98, #99, #100, and #101:

careless25,

Answers to #94, #98, #99, and #100 : Correct!

Jai Ganesh · 2009-01-06 21:29:56

Answer to #135:-

Correct, JaneFairfax!

Jai Ganesh · 2009-01-06 21:46:42

Answers to #109, #110, #111, #112, #113, #114, and #115:-
careless25, the answers to #109, #111, #112, and #113 are correct.

Jai Ganesh · 2009-01-06 21:55:50

Answer to #124:
You are correct, JaneFairfax!

careless25 · 2009-01-07 02:08:27

Jai Ganesh · 2009-01-07 02:37:24

careless25,
I thought from that point of view for a second, but didn't go any further! That was my mistake!
Your answer too is perfectly logical and fits in.
Good thought! Well done!!!

Jai Ganesh · 2009-01-07 19:58:04

Complete the series:-

#136. 1, 6, 36, 216, ____

#137. 1973, 1979, 1987, 1993, 1997, 1999, ______.

#138. 5, 10, 13, 26, 29, 58, 61, _______.

#139. 11, 13, 17, 19, 23, 29, 31, 37, 41, _____.

#140. 3, 7, 6, 5, 9, 3, 12, 1, 15, ______.

#141. 11, 24, 67, 122, 219, _____.

#142. 64, 32, 35, 5, 22, 11, 14, _____.

#143. 0, 6, 24, 60, 120, ______.

JaneFairfax · 2009-01-08 03:49:09

careless25 · 2009-01-08 08:20:41

Math Is Fun Forum

#201 2009-01-03 23:52:50

Re: Brain Teasers

#202 2009-01-04 00:03:10

Re: Brain Teasers

#203 2009-01-04 00:22:09

Re: Brain Teasers

#204 2009-01-04 01:08:15

Re: Brain Teasers

#205 2009-01-04 01:53:52

Re: Brain Teasers

#206 2009-01-04 03:11:57

Re: Brain Teasers

#207 2009-01-04 04:44:11

Re: Brain Teasers

#208 2009-01-05 01:55:08

Re: Brain Teasers

#209 2009-01-05 03:08:45

Re: Brain Teasers

#210 2009-01-05 03:18:27

Re: Brain Teasers

#211 2009-01-06 08:19:07

Re: Brain Teasers

#212 2009-01-06 08:41:50

Re: Brain Teasers

#213 2009-01-06 08:48:03

Re: Brain Teasers

#214 2009-01-06 08:50:03

Re: Brain Teasers

#215 2009-01-06 12:04:38

Re: Brain Teasers

#216 2009-01-06 20:58:41

Re: Brain Teasers

#217 2009-01-06 21:22:14

Re: Brain Teasers

#218 2009-01-06 21:29:56

Re: Brain Teasers

#219 2009-01-06 21:46:42

Re: Brain Teasers

#220 2009-01-06 21:55:50

Re: Brain Teasers

#221 2009-01-07 02:08:27

Re: Brain Teasers

#222 2009-01-07 02:37:24

Re: Brain Teasers

#223 2009-01-07 19:58:04

Re: Brain Teasers

#224 2009-01-08 03:49:09

Re: Brain Teasers

#225 2009-01-08 08:20:41

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