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Question
What if someone gives you to add ten numbers together?
Did you notice some pattern in the answers?
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Solution
In each succeeding pattern, the final sum is increased by 100.
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RELATED QUESTIONS
Circle the multiples of 9 (by using casting out nine).
13476
Circle the correct addition fact (by using casting out nine).
7632 + 2213 = 9845
Circle the correct subtraction fact (by using casting out nine).
2362 – 632 = 1720
Circle the correct subtraction fact (by using casting out nine).
3264 − 1063 = 2200
Complete the following sequence.
100, 400, 700, ______, _______, ________.
Complete the following sequence.
| 200 | 400 | 600 |
The school bell rings once in an hour, to indicate that the session ends/next session begins. And for break, it will be 20 minutes. Shall we try to fill this up?
Here is the time table.
| Period 1 | Period 2 | Break | Period 3 | Period 4 | Break | Period 5 | Period 6 |
| 9:00 | 10:00 | 11:00 | 2:40 |
Imagine you are a traffic inspector. You are asked to design the traffic signal timings. Can you design it?
| Red | Yellow/Orange | Green | Red | Green |
| 7:30 a.m |
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.
| Take the smallest number | 3 |
| 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.
