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प्रश्न
Add the three numbers on each of these lines. What do you notice?
5 + 13 + 21 =
6 + 13 + 20 =
7 + 13 + 19 =
12 + 13 + 14 =
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उत्तर
5 + 13 + 21 = 39
6 + 13 +20 = 39
7 + 13 + 19 = 39
12 + 13 + 14 = 39
On adding these numbers, it is noticed that the total of each such line is the same.
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संबंधित प्रश्न
Think of many different things that can take different times. Make your table as long as you can.
| Takes minutes | Takes hours | Takes days |
| a bath | to stitch a shirt | to knit a sweater |
| to boil milk | to set curd | to weave a sari |
| a school day | for a banana to become ripe |
Irfan’s mother is twice as old as him. She is also 20 years older than him. Guess the ages of Irfan and his mother.
Look at the birth certificate of bincy.
2/5/2002 shows that Bincy was born on 2 ____, in the year 2002.
Look at the birth certificate of Bincy.
How old will she be in the year 2052?
Look at the birth certificate of Bincy.
After how many months of Bincy's birth was the certificate issued?
Look at the birth certificate of Bincy.
What is the registration number of Bincy's certificate?
Let us look at the calendar for the year 2020.
How many days make a week?
Which festival comes in the beginning of the year?
Now look at the calendar of 2020. Also look for the present month and draw any similar square in your notebook. Does the magic work for these?
Is this magic possible on a 10 × 10 number chart? Go to the Chapter ‘Fun with Numbers’ and check.
