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Question
Now try doing it with some other number and also take a different number to add at each step.
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Solution
15 × 2 + 5 = 35
15 × 3 + 5 = 50
15 × 4 + 5 = 65
15 × 5 + 5 = 80
15 × 6 + 5 = 95
15 × 7 + 5 = 110
15 × 8 + 5 = 125
We can see the difference between two subsequent numbers is 15
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Complete the following sequence.
| 200 | 400 | 600 |
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.
Look at this pattern of numbers and take it forward.
1 = 1 × 1
121 = 11 × 11
12321 = 111 × 111
1234321 = ?
