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Question
Complete the following sequence.
9 × 111 = 999
9 × 222 = 1998
9 × 333 = 2997
9 × 444 = ________
9 × 555 = ________
9 × 666 = ________
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Solution
9 × 111 = 999
9 × 222 = 1998
9 × 333 = 2997
9 × 444 = 3996
9 × 555 = 4995
9 × 666 = 5994
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A city is planned in such a way that every 5 km has a circle and has 4 signals around.
So, can you guess where the signals and circle are there?
How many signals are needed for a 20 km distance?
Look at the calendar below.
Let us mark 3 × 3 boxes (9 dates) on the calendar and see some magic.
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| Add 8 to it | +8 |
| = | 11 |
| Multiply it by 9 | ×9 |
| Total | 99 |
Now you choose any 3 × 3 boxes from a calendar and find the total in the same way.
What if someone gives you to add ten numbers together?
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Ask your friend rite — W down your A age. dd 5 to it. Multiply the sum by 2. Subtract 10 from it. Next, divide it by 2. What do you get?
