Find the greatest and the smallest numbers. 6895, 23787, 24569, 24659.

India's population has been steadily increasing from 439 millions in 1961 to 1028 millions in 2001. Find the total increase in population from 1961 to 2001. Write the increase in population in Indian system of numeration, using commas suitably.

Find the product of the smallest whole number with the largest three-digit whole number.

Try arranging 18 marbles in rows and find the factors of 18

Try to form a polygon with
(i) five matchsticks.
(ii) four matchsticks.
(iii) three matchsticks.
(iv) two matchsticks.
In which case was it not possible? Why?

Is this possible to draw a rough sketch of two triangles having two sides are common?

Draw five other situations of one-fourth, half and three-fourth revolution on a clock.

Going up and down
In Mohan's house there are stairs for going up to the terrace and for going down to the godown.
Let us consider the number of stairs going up to the terrace as positive integer, the number of stairs going down to the godown as negative integer, and the number representing ground level as zero.

Do the following exercise and write down the answer as integer:
(a) Go 6 steps up from the ground floor.
(b) Go 4 steps down from the ground floor.
(c) Go 5 steps up from the ground floor and then go 3 steps up further from there.
(d) Go 6 steps down from the ground floor and then go down further 2 steps from there.
(e) Go down 5 steps from the ground floor and then move up 12·steps from there.
(f) Go 8 steps down from the ground floor and then go up 5 steps from there.
(g) Go 7 steps up from the ground floor and then 10 steps down from there.
Ameena wrote them as follows:
(a)+6
(b)-4
(c) (+ 5) + (+ 3) = + 8
(d) (-6) + (-2) =-4
(e)(-5)+(+12)=+7
(f)(-8) +(+5)=-3
(g) (+ 7) + (-10) = 17
She has made some mistakes. Can you check her answers and correct those that are wrong?

In the word 'IMAGE', which letter has identical mirror image?

The peculiar number:
There is a number which is very peculiar. This number is three times the sum of its digits. Can you find the number?