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Recent puzzles under tag mathematical

+1 vote
N has precisely 10 positive divisors. N has precisely 15 positive divisors. N has precisely 20 positive divisors....
posted Jun 13, 2017 by anonymous
  • number puzzle
  • mathematical
+3 votes
Dmitri was working on a mixture whose weight comprise of 90% liquid and 10% solid. The total weight of the.............
posted Jun 13, 2017 by Yogeshwar Thakur
  • logic
  • mathematical
0 votes
A dad offered to pay her daughter Rs 5 for every correct answer on her maths test. Her daughter said she would pay......
posted Jun 13, 2017 by Rahul Vaidya
  • logic
  • mathematical
+1 vote
P, Q, R can do a work in 12, 8 and 6 days respectively. Q and R start the work and leave after 2 days...
posted Jun 12, 2017 by anonymous
  • time work
  • mathematical
+1 vote
How many ways can n books be placed on k distinguishable shelves?
posted Jun 11, 2017 by anonymous
  • permutation
  • mathematical
  • logic
0 votes
A bag contains Red and Black Balls. Two balls are drawn and probability that both the balls drawn are red is 1/2...
posted Jun 11, 2017 by anonymous
  • probability
  • mathematical
+1 vote
This is a mathematical and number puzzle if you have mind solve it
posted Jun 11, 2017 by anonymous
  • mathematical
0 votes
What 3 digit number will give you the same answer whether you subtract 5 or divide by 5?
posted Jun 10, 2017 by Divya Joshna
  • mathematical
  • number puzzle
0 votes
Find sum of all the positive integral values of x and y such that 2^x + 3^y is a perfect square?
posted Jun 9, 2017 by anonymous
  • algebra
  • mathematical
0 votes
Find the number of distinct fractions a/b, where both a & b are integers with 0<=a<=b<=50 and gcd(a,b) = 1?
posted Jun 9, 2017 by anonymous
  • algebra
  • mathematical
  • number puzzle
0 votes
What would be the answer of the following equation?
posted Jun 8, 2017 by anonymous
  • mathematical
+2 votes
What is full of holes but still holds water?
posted Jun 8, 2017 by Ambuj Chaudhary
  • mathematical
0 votes
If 1+2=3, 2+3=16 and 3+4=45 then 4+5=??
posted Jun 7, 2017 by anonymous
  • mathematical
  • number puzzle
0 votes
If 8638 + 7542 = 1215 & 5589 + 2468 = 4331 Then; 1357 + 1919 = ????
posted Jun 6, 2017 by Ankur Athari
  • mathematical
  • number puzzle
  • logic
+1 vote
Present ages of two persons differ by 35 years. 3 years later, elder one would be 4.5 times as old as younger one....
posted Jun 5, 2017 by anonymous
  • time age
  • mathematical
0 votes
Sarah asked his grandmother: “How old are you?” She replied: “I have 6 children and.........How old is Sarah’s grandma?
posted Jun 1, 2017 by Parampreet Kaur
  • logic
  • time age
  • mathematical
0 votes
If man covers 250km by train and rest by bus it takes him 4 hours but if he travels 130km by train and rest by bus...
posted Jun 1, 2017 by anonymous
  • time distance
  • mathematical
0 votes
A box contains 4 red, 6 green & 8 black balls. 3 balls are drawn, find probability of all balls are of different color?
posted Jun 1, 2017 by anonymous
  • probability
  • mathematical
0 votes
Using any combination of +, x, -, / and all of the digits 2, 3, 6 and 8 once only, make the number 36?
posted Jun 1, 2017 by anonymous
  • logic
  • number puzzle
  • mathematical
0 votes
Which number will replace a, b, c, d in the image below ?
posted May 31, 2017 by Rajesh Jk
  • mathematical
  • number puzzle
0 votes
Can you identify the numbers missing in the Boxes ?
posted May 31, 2017 by Rajesh Jk
  • number puzzle
  • mathematical
  • logic
0 votes
If 2+3+4=27, 3+4+5=56, 5+6+7=168 and 6+7+8=259 then 1+2+4=??
posted May 31, 2017 by Deepak Jangra
  • logic
  • mathematical
  • reasoning
0 votes
If 96 mangoes are bought for Rs. 1440 and sold at Rs. 72 per half dozen. What is the percentage of profit or loss?
posted May 31, 2017 by anonymous
  • profit loss
  • mathematical
0 votes
Given that A is a matrix of order 5x3 and B is a matrix of order 3x5, then what is the value of |C| if A x B = C?
posted May 29, 2017 by anonymous
  • mathematical
  • algebra
  • matrix
+3 votes
How many of each coin is there and what are their values?
posted May 29, 2017 by Mishthy Mukherjee
  • logic
  • mathematical
+1 vote
Probability of landing a 6 in an unfair Dice.
posted May 29, 2017 by Tejas Naik
  • probability
  • tricky
  • mathematical
0 votes
In triangle ABC, D and E are points on sides AB and AC respectively such that AD × EC = AE × DB. Prove that DE || BC?
posted May 28, 2017 by anonymous
  • geometry
  • mathematical
0 votes
How many max number of mixed double tennis can be played among four couple if husband & wife are not allowed in a team?
posted May 27, 2017 by anonymous
  • mathematical
  • logic
  • permutation
0 votes
Consider the regular 9-gon as shown in figure, Which area is larger: the grey or the white?
posted May 26, 2017 by Chahat Sharma
  • geometry
  • mathematical
–1 vote
There are 12 boys and 9 girls, if three students are selected at random, find probability of 1 girl & 2 boys selection?
posted May 26, 2017 by anonymous
  • probability
  • mathematical
0 votes
Boatman goes 4km against current in 2hr and 7.5km along current in 90min. How long he take for 7 km in stationary water?
posted May 25, 2017 by anonymous
  • time distance
  • mathematical
0 votes
N has 3 prime factors, N^2 has 7!! positive divisors, N^3 has 10!!! positive divisors, __ has 13!!!! positive divisors?
posted May 24, 2017 by Pushpak Chauhan
  • mathematical
  • logic
0 votes
How many different paths can the grasshopper take to reach his destination?
posted May 24, 2017 by anonymous
  • permutation
  • mathematical
+1 vote
What's the probability that A wins the duel?
posted May 24, 2017 by anonymous
  • probability
  • mathematical
0 votes
Can you solve the number puzzle by replacing the question mark with a number ?
posted May 22, 2017 by Richa Patil
  • number puzzle
  • mathematical
+1 vote
x and y are 2 digit numbers where y is obtained by reversing x. If x^2 - y^2 = m^2 then find the value of x+y+m?
posted May 22, 2017 by anonymous
  • mathematical
  • algebra
  • logic
0 votes
A cylinder has a total surface area of 6Pi. What is its maximum possible volume?
posted May 22, 2017 by anonymous
  • geometry
  • mathematical
  • logic
+1 vote
Can you solve the below maths equation and find the value of cup?
posted May 22, 2017 by Naziya Raza Khan
  • logic
  • mathematical
0 votes
When an item is sold for Rs. 26,100, the owner loses 13%. At what price should that plot be sold to get a gain of 13.5%?
posted May 22, 2017 by anonymous
  • percentage
  • profit loss
  • mathematical
0 votes
Can you this puzzle of balancing load in the Image ?
posted May 20, 2017 by Ranjith Havaldar
  • mathematical
  • logic
0 votes
If 4^(n + 4) - 4^(n + 2) = 960, What is the value of n?
posted May 19, 2017 by anonymous
  • number puzzle
  • mathematical
0 votes
11 spheres of radius 3 m, 9 cylinder of radius 4 m, height 5 m and 13 cones of radius 2 m, height 4 m are melted...
posted May 18, 2017 by anonymous
  • geometry
  • mathematical
0 votes
Two trains each 365 meter long, are running in same directions. If their speeds are 44 km/hr and 64 km/hr...
posted May 17, 2017 by anonymous
  • time distance
  • mathematical
0 votes
A man can row a Boat Upstream at 10km/hr and Downstream at 16km/hr, than what is the speed of the stream ?
posted May 16, 2017 by Ambika Sharma
  • speed
  • mathematical
+1 vote
can u find the correct answer? 2[2{3-6(4x5)2}7+6]
posted May 16, 2017 by Remruata Pachuau
  • mathematical
+1 vote
9 unit circles are packed into a square. What is the length of longest path connecting two opposite corners of square?
posted May 15, 2017 by Pushpak Chauhan
  • geometry
  • mathematical
0 votes
On selecting one card of the pack of card which one has more probability: a card that divides by 3 or a picture card?
posted May 14, 2017 by anonymous
  • probability
  • mathematical
0 votes
A 1/4 mile long train at speed of 76 mph enters a tunnel of 9/2 miles long. How long does it take for train to cross?
posted May 10, 2017 by anonymous
  • time distance
  • mathematical
+1 vote
3 rational numbers form a GP, if 8 is added to the middle number, then this new sequence forms an AP...
posted May 10, 2017 by anonymous
  • mathematical
  • logic
  • number puzzle
+1 vote
A right trapezoid is partitioned into 4 triangles by its diagonals, as shown. Which colored region has a largest area?
posted May 10, 2017 by anonymous
  • geometry
  • mathematical
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