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PUZZLES

 

#1 a farmer had 17 sheep. all but 9 died. How many is he left

     with?

#2 on multiplying together all the nos. 1,2,3,4,5,6,7,8,9,

     and 0,what do you get?

# 3 a plane take 1 hour and 20 minutes to fly from city a to

     city b and only 80 minutes to return. does the plane take

      less time while returning?

#4  if a boy takes 5 seconds to write the digits from 1 to9 ,

    how much time does he take in writing the digits from 9

     to1 backwards?

# 5 a man went to bed at 8 o’ clock one evening after setting

    the alarm for 9 in the morning . when the alarm woke

     him up, how many hours of sleep did he have?

# 6 if there are 12 one –rupee stamps in a dozen , how many

     two-rupee stamps are there in dozen ?

#7  what is the smallest integer that can be written with

   two identical digits?

# 8 can you write 10 with five 9’s ? if yes how ?

# 9 write the biggest number by using four 1’s .

#10 today  is sam’s birthday. one year  hence he will be twice as

     old as he was 10 years ago . how old is sam  today ?

#11 a wheel has 16 spokes . how many spaces are there

    between the spokes ?

#12 if clock takes 2 seconds to strike 2o’ clock , how long

    does it to strike 30’ clock ?

#13  is the number " eleven thousand eleven hundred and

     eleven" divisible by 3 ?

#14  if a snail climbs an electric pole at the rate of 90 cm a

     day but slips back 60 cm every night ,how long will it the

     snail to reach the top of a 360 cm high pole ?

    ANSWERS:

  1. 9
  2. 0
  3. No, because 80 minutes= 1Hr 20 minutes.
  4. 5 sec
  5. 1 hour
  6. 12
  7. The smallest integer that can be written with two digit is not 11, as some might think, but 1, as 1 can expressed as 1/1 , 2/2 , 3/3 , 4/4 , ...
  8. Yes , 10 can be written with five 9's in two ways as follows : 9*99/99=10 and 99/9-9/9=10
  9. Is 11 to the power of 11.
  10. 21
  11. 16
  12. 4 sec, it is two sec between successive strikes.
  13. Yes. The number is in fact 12111 which is divisible by 3.
  14. 10 days.

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