BRAIN TEASERS - Thulasi XI B
1) Team
A wins 19 out of 20 games. Team B wins 7 out of 8 games. Which team has a
higher percentage of wins?
2) How
can you get 26 using 5 fives?
3) A
two digit number equals five times the sum of its digits. If you add 9 to the
number, the order of its number is reversed. What is the number?
4) What
number gives the same result when it is added to 1.5 as when it is multiplied
by 1.5?
5) Replace
the asterisks by the correct mathematical signs to make the expression equal to 64: 18*12*3*8 = 64?
6) On
the first day of summer camp, every child met and shook hands with every other
child, if there were 12 children present, how many total handshakes were there?
7) A
box has 16 candies: 12 red and 4 yellow. If you were picking candies from the
box without looking, how many candies would you pick up to be certain to find
two of the same color?
8) In
the parking lot of your building, there only are two wheelers and four
wheelers. If there are a total of 40 vehicles and 104 wheels in the parking
lot, how many four wheelers are there?
9) Here’s
a variation on a famous puzzle by Lewis Carroll, A group of 100 soldiers suffered the
following injuries in a battle: 70 soldiers lost an eye, 75 lost an ear, 85 lost a leg,
and 80 lost an arm. What is the minimum number of soldiers who must have lost
all 4?
10)
Mr.Seibold has 6 daughters. Each daughter
is 4 years older than her next younger sister. The oldest daughter is 3 times
as older than her youngest sister. How old is each of the daughters?
ANSWERS
1) Team
A
2) 55-5
+5(5)
3) 45
4) 3
5) 18
x 12/3- 8 = 64
6) 66[n
X (n-1)/2]
7) 03
8) 12-
four wheelers, 28- two wheelers
9) 100
soldiers suffered a total of 310 injuries which means, at a minimum, 100
soldiers lost 3body parts, and 10(the remainder when dividing 310 by 100)must
have lost all 4 body parts.(In reality, as many as 70 may have lost all 4 body
parts)
10)
From youngest to oldest, the 6 daughters
are 10, 14, 18, 22, 26, and 30.
*****
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