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प्रश्न
Is this magic possible on a 10 × 10 number chart? Go to the Chapter ‘Fun with Numbers’ and check.
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उत्तर
check with a 10 × 10 number chart
Yes, the magic works in a 10 × 10 number chart also.
The cross lines- 1 + 12 + 23+ … + 89+ 100 = 505
and 10 + 19 + 28+ … + 82 + 91 = 505
As there is no middle line, we have to get average sum of both horizontal lines
5 + 15 + 25+ … + 95 and 6 + 16 + 26 + … 96 = 505
Average sum of both vertical lines
41 + 42 + 43 + … + 50 and 51 + 52 + 53 + … + 60 = 505.
Thus, the magic works here as well.
APPEARS IN
संबंधित प्रश्न
This is a story with topsy turvy time.
As the sun sets ______ Sumana wakes up. What a lovely evening! ______. She washes her face fast in 2 hours ______ and runs out. She goes straight to the bird’s nest. She has been watching the eggs for the last few months ______. She was waiting for the baby birds to come out. But before she can blink her eyes, in a week ______ a cat jumps on to the tree. The mother bird cries loudly and Sumana rushes to shoo away the cat. As the cat jumps, it hits the big green mango. Dhum!...
...In two days ______ it is on the ground! Oh, how sad! The mango is still not fully ripe. It needed one more year ______ to become sweet. Suddenly Sumana’s sister calls but - Are you still not hungry? Has your stomach clock gone to sleep? Come and eat hot upma for dinner ______.
Wasn’t that funny? You must have guessed that the coloured words are wrong. Choose the correct word from the box given below and write it next to the wrong word.
| Days | rises | seconds | morning |
| Breakfast | moment | minutes | week |
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 |
Fill in the blanks with the correct year:
| 2017 | 2020 | 2019 | 2018 | 2021 | 2023 |
Which year will be the next year?
See if this magic works for other lines which have five numbers. What about five numbers on a slanting line? Try this trick with your family and friends. Can you find other magic patterns in the calendar?
Colour all the Sundays in red.
On which day does this month end?
What is the day on the 29th? What will be the date on the same day next week?
Is there any other day in any month which comes 5 times?
Can there be 6 Sundays in a month? Why?
| Time of the Day in words | On the clock | What do you do at this time? |
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