## Curious calculations

(1) Try these multiplications. What do you notice?

$1 \times 1$

$11 \times 11$

$111 \times 111$

$1111 \times 1111$

$11111 \times 11111$

Does the pattern continue if you use longer strings of 1’s?

(2) Enter  the number 142,857 (preferably, into the memory) and multiply by 2,3,4,5,6 and 7. What do you notice?

Enjoy math!!!

Regards,

Nalin Pithwa

I]1×1=1
11×11=121
111×111=12321
1111×1111=1234321
11111×11111=123454321

II] 142857 When multiplied by any number(within 10) gives result with only the digits-1,4,2,8,5,7,

• Posted August 5, 2015 at 12:55 pm | Permalink | Reply

very good keep it up!

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