Become Normal!!
Robi is a very serious student.
On the first day of this year his seriousness for study was 1 hour.
But after that day he increases his seriousness for study everyday by 10 minutes!!
On the other hand Fariha is a very crazy girl!!
On the first day she showed her craziness to her parents for 2 hours!!
And everyday she decreases her craziness for 2 minutes.
Now can we find out on which date both Robi and Fariha will become normal again?
Notes:
1.His/her seriousness or craziness can’t be negative or more than 24 hours.
2.After the day, he/she become normal, he/she again starts to increase his/her seriousness/craziness.
3.Look on the first day Robi was normal but not Fariha.
4.When he/she reaches the limits he/she, all on a sudden, becomes normal.
Both are in Arithmetic Progression then
in Robi’s case
a=1
d=10/60=1/6
tn=24
a+(n-1)d=tn
1+(n-1)1/6=24
(n-1)1/6=23
(n-1)=138
n=139
So in 139 days Robi’s seriousness reach 24 hours then we can assume in 140 day his Seriousness become normal
In Fariha’s case a=2
d=2/120=1/60
tn=0
here n=121
So in 121 days Fariha’s craziness becomes normal.
so both will become normal again lcm(121,140)=16940.
Answer is 16940 [Assuming Robi ‘s seriousness can reach 24 hours and next day it become normal, if in the same day of reaching 24 hours his seriousness becomes normal then answer will be (121,139)=16819 ]
Your Answer
More puzzles to try-
Student’s Fun
Teacher ask the student ‘Why are you standing on that chair in music class ?’. what did student replied ?Read More »Dinosaur days
Imagine you are in the ancient days of the dinosaurs, and one dinosaur is chasing after you. What do you ...Read More »Choose Partner
In a game of whist, GEORGE partnered MARY, while TED had to select a partner from ANN, EDNA, JOAN or ...Read More »If you remove one, only two letters remain riddle
I’m a five letter word. If you remove one, only two letters remain. What word am I?Read More »two sisters tale
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who ...Read More »Bright and yellow
It is bright and yellow and turn on and off everyday, some say they need me but others wish that ...Read More »Cyclist Puzzle
You are a cyclist in a cross-country race. Just before the crossing finish line you overtake the person in second ...Read More »Keep Silence
You knock a Table over in the library, and suddenly 20 eyes are looking at you. How many people in ...Read More »Sound like Sneeze
What is a foot long, made of leather, and sounds like a sneeze?Read More »House Hunting in London
While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me: ...Read More »Crossing a Bridge riddle
Four men want to cross a bridge. They all begin on the same side. It is night and they have ...Read More »Linear Thinking Riddle
There are four people in a house. A fireman, an athlete, an old woman, and a drunk guy. The house ...Read More »Favorite Foods riddle
The favorite foods of Megan, Michael, Sergi, and Jana are written below. Each person has a different favorite food. Use ...Read More »Which do you light first?
You are in a cabin and it is pitch black. You have one match on you. Which do you light ...Read More »Solve The Logic
Can you solve the photo plexer logic ?Read More »Which one is telling the truth?
Mrs. Stotch is a fifth grade teacher. One of her students took her apple. Mrs. Stotch has narrowed the suspects ...Read More »IAS Tricky Riddle
How can a man go eight days without sleep ?Read More »What number divided by 4 Riddle
What number divided by 4 is the same as that number minus 4?Read More »You are glad to find me riddle
You are glad to find me when you need me, or you always ignore me. When you call me, I ...Read More »Always confusing
It requires our mental skill to decode it, Our imagination to understand, Our knowledge is tested to its max, Confuses ...Read More »