Solve it graphically Shruti and Swati each have certain number of pens. Shruti says to Swati, “If you give me 10 of your pens, I will have twice the number of pens left with you. Swati replies, ‘‘If you give me 10 of your pens, I will have the same number of pens as left with you. Find the number of pens with Shruti and Swati separately.

A and B each has same money. If A gives Rs 30 to B, then B will have twice the money left with A. But if B gives Rs 10 to A, then A will have thrice as much as is left B. How much money does each have ? Solve this situation graphically.

One says, “Give me a hundred, friend ! I shall then become twice as rich as you”. The other replies, “If you give me ten, I shall be six times as rich as you.” Tell me whatistheamount of their (respective) capital ? [From the Bijaganita of Bhaskara II]

I am the smallest number ,having four different prime factors.Can you find me ?

You must have had a friend who must have told you to think of a number and do various things to it, and then without knowing your original number, telling you what number you ended up with. Here is one example. Examine why they work. Write down any three-digit number (for example, 425). Make a six-digit number by repeating these digits in the same order (425425). Your new number is divisible by 7, 11 and 13.

"Give me a living cell of any plant and I will give you a thousand plants of the same type". Is this only a slogan or is it scientifically possible? Write you’re your comments and justify them.

You must have had a friend who must have told you to think of a number and do various things to it, and then without knowing your original number, telling you what number you ended up with. Here is one example. Examine why they work. Choose a number. Double it. Add nine. Add your original number. Divide by three. Add four. Subtract your original number. Your result is seven.