#291 - Tricky Maths Eqaution Problem
Can you solve this tricky maths equation problem by replacing ? mark with correct symbol ?
19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???
117(1+3+5,3+4)
#292 - Maths Magic Puzzle
A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...
and the resulting number consist of only one digit.
Can you identify the number ?
12345679
12345679 × 9 = 111111111 (only 1s)
12345679 × 18 = 222222222 (only 2s)
12345679 × 27 = 333333333 (only 3s)
12345679 × 36 = 444444444 (only 4s)
12345679 × 45 = 555555555 (only 5s)
#294 - Michael Phelps Maths Problem
Michael Phelps , the famous swimmer can swim downstream in a lake in exact 40 minutes (with the lake current helping time).
He can swim upstream in a lake in exact 60 minutes (against the lake current).
The length of lake is 2 kilometers.
How long Michael Phelps can cover distance of one side at a still lake (no current).
48 minutes
#295 - Trick Maths Riddle
I have a role of cloth 1km long.
I have a machine which cuts this role into pieces of 10 meter long cloth.
How long would it take for the machine to cut the roll if each cut took 4 secs ?
396 seconds
1000m would only take 99 cuts not 100.
so 4*99 => 396
#296 - Maths Percentage Riddle
I guess 76.8% readers will like this riddle.
What's the least number of people should read this post ?
125 people
96/125 = 76.8
#297 - Friends Maths Puzzle
Ross five friends Rachel,Monica Phoebe,Joey and Chandler lives in the same road.
Rachel lives in house:A , Monica lives in house:B , Phoebe lives in house:C , Joey lives in house:D , Chandler lives in house:E
Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E
The road numbers run from 2 to 222.
Can you tell the house number of each of Ross's friends ?
Rachel lives in House no.36
Monica lives in House no.4
Phoebe lives in House no.9
Joey lives in House no.35
Chandler lives in House no.24
#298 - Easy Math Problem
In a strange city , there are just 2 houses.
If one person from house1 goes to house2, then the population of house2 is twice the population of house1.
While if one person from house2 goes to house1, then the population of house2 is same as the population of house1.
what the population of each house ?
House1-> 5
House2-> 7
#299 - Mathematics Problem
I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.
How Long will it take to fill the bucket?
3 hours
Explanation :
(1/6 + 1/4 - 1/12) ^ (-1)
= (1/3)^(-1) = 3
#300 - Labor Day Maths Puzzle
Manish drive to his office at 20km/hr. After reaching office, he realize that today is a holiday of 'Labor Day'.He went back at average speed of 30km/hr. Discounting the time spent in the stoppage what was his average speed of his journey ?
24km/hr (not 25km/hr which might be guessed by many)
D : distance traveled
T1 : time of going to office
T2 : time of returning back
Y : Average Speed
D = 20 * T1
T1 = D/20
D = 30 * T2
T2 = D/30
2D = Y(T2 + T1)
2D = Y(D/20 + D/30)
2D = Y(3D/60 + 2D/60)
2D = Y(5D/60)
Y = 120D/5D
=> Y = 24