Madhanika took part in a sack race. 11 lemons were kept at intervals of 1m each, the first being 5m from the 'start' point and
the others were farther off. She had to run, collect the first lemon, bring it back to the start, put in a bucket; again go and
collect the second and so one. How far would she run to collect all the 11 lemons?
A lady selling eggs was tripped by the royal elephant and lost all eggs. She complained to the King who instructed his Manthri
(Minister) to compensate her. Manthri asked the lady how many eggs she carried. The lady did not know but she knew this: When she
2 by 2 she found 1 remaining;
3 by 3 she found 2 remaining;
4 by 4 she found 3 remaining;
and so on and finally
10 by 10 she found 9 remaining;
Can you tell the manthri how many eggs did the lady carry so that he can pay her for them?
- Kumar sent '23849' as SMS, saying this was his 8-digit phone number. Can you find it?
My young student Ann Mary was doing a problem in 'Combinations'.
The result was
(7C3 x 6C2) +
(7C4 x 6C1) +
(7C5 x 6C0)
(35 x 15) + (35 x 6) + (21 x 1).
As Ann Mary was getting ready to 'attack' this terrible calculation, I told this is a simple mental work and the answer was 756.
Could you figure out how?
Raj and Ravi were friends who were selling ghee. One day they were passing through a forest to go to the town
on the other side to sell ghee. They had three (irregular shaped) vessels with exact capacities of 3, 5 and 8 litres.
The smaller ones were empty and largest one was full of fresh and wholesome cow ghee. Unfortunately, on the way they
started to quarrel so bitterly that they decided to go separately. They, now, had to share the ghee into equal
measures but they did not have any other vessel or container or measure. How would they split evenly?
A wild boar runs at a speed of 20m a minute. A hunter is chasing it. But the hunter decides to run
1m the first minute, 2m the second minute, 3m the third minute and so on. After how many minutes will
he catch the boar?
The average weight of 10 boys was 63kg. Two boys weighing 56kg and 54kg left the group
and two new boys weighing 48kg and 62kg joined the group. What is the new average?
Priya’s maths teacher taught the class how to fill magic squares fast. She drew a Jumbo 25 x 25
square and started to fill the consecutive numbers from 1. What will be the row or column or diagonal total?
27 + 31 + 35 + ... + 63 = ? [Everyone will list all the numbers and add. That is not aptitude!]
A very devout Bhaktha visits two nearby Ganapathy temples. Each temple has a tank which will double the number of flowers
that are dipped in it. He gathers some flowers from the Nandavanam (Temple garden); dips them in the temple-tank while bathing;
offers a few of the flowers to Ganapathy. He goes to the second temple with the left-over flowers; dips them in the tank; offers
the same number of flowers to this Ganapathy also. He has no more flowers left. How many flowers did he start with and how many
flowers did he offer to the Ganapathys?
Refer to previous problem. On an auspicious day the Bhaktha visits three such Ganapathy temples. What are the answers?
A 3 x 3 magic square is filled by consecutive multiples of 3 starting from 21 onwards. What will be the total of any one
A 4 x 4 magic square is filled by natural numbers from 41 downwards. What will be the total
of any one column?
An elephant costs 5 varaagan (gold coin); a horse costs 3/4 varaagan and a goat
costs 1/4 varaagan. How many of each one should buy if he has to buy exactly 100
animals whose cost is exactly 100 varaagans?
Little Chandhru was asked to write all the page-numbers of a little book on a paper and find their
average. His friend Punitha also got interested and she also started to do the same independently. After a while, they came
up with different answers: Chandhru, 37.4 and Punitha, 37.5. Which answer is more probably correct?
210 + 210 + 210 + 210 = 2?
What is the sum of all odd numbers below 100?
What is the sum of all even numbers upto 100?
What is the area of a square of diagonal 1.414 units to the nearest whole number?
What is the area of a rectangle 5 units tall and one of its diagonal measuring 13 units?
One side of a right-angled triangle is 12cm. Write the other two sides. [There are more than one set of answers.]
Sreenivas was writing the English names of numbers from 1 to 1000. How many distinct words did he have to use?
Both Santosh and Sumit solved the problem, lady with eggs, and each got a different answer. Is there only one answer or
A 5 x 5 magic square is filled with numbers from 21 onwards. What is the line, column or diagonal total?
|Little Mahesh wrote:
|T ||H ||R ||E ||E ||+ |
| ||F ||O ||U ||R || |
|E ||I ||G ||H ||T|| ||
||Little Selvi wrote:
|T ||H ||R ||E ||E ||+ |
| ||F ||O ||U ||R || |
|S ||E ||V ||E ||N || |
Kali said, "Both are right!"
Can you find the digits that will replace the letters in each case?
Example: A 5x5 magic square filled with numbers from 1 to 25.