Page:Happy-Maths-1-English.pdf/25



Sankhya watched as Amma made a beautiful rangoli. First she made many dots. Then she joined the dots to make designs.

“Amma, how do you know how many dots to make?”

Amma mumbled something, because she really did not have an answer.

But Zzero has discovered a way to make shapes out of numbers.

Take any number and its next number. (Two numbers that have a difference of one are called consecutive numbers)

Multiply them and divide the answer by 2.

You can make a triangular number grid with this new answer.

6 x 7 ÷ 2 = 21. 23