Sahana Lakshmipathy (@sahanalaks) - Deepstash

Sahana Lakshmipathy

@sahanalaks

82 Followers

1 Following

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39 STASHED IDEAS

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10 PUBLISHED IDEAS

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Hyperthymesia

People with hyperthymesia can recall details relating to past experiences with extreme accuracy throughout their lifetime.

Studies suggests that the ability is limited to autobiographical memory. This limitation means that people can only recall information about themselves and their past personal experiences.

Information can be retained either as short-term or long-term memories. They process short-term memories in a similar way to most other people. However they have good long term memory.

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10%: all you have to do is divide by 10

1%: divide the no. by 100

50%: divide the no. by 2

25%: divide the no. by 4

75%: triple your 25%

20%: double your 10%

2%: double your 1%

15%: add 10% and 5%

200%: double the whole no. i.e 100%

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Multiplying 2 digit no.s ending with 1

Step 1: Since the no.s end with one our answer will contain the last digit as 1. Have that in mind.

Step 2: Now add both the tens digits i.e., (x + y) this is you tens place. (In case of double digit add it after step 3)

Step 3: Again take those two previous no.s and now multiply them i.e., (xy) this will give you the hundreds place in case of a single value or also a thousands place along with it if it is a double digit.

Finally put them all together and that's your answer

e.g 41 x 61

Ones digit:1

Tens digit:

ones digit: 1

tens digit: 10 so, 0 (1 will be carried)

Hundreds digit: 24

Final answer: 2501

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Squaring numbers ending with 5

Squaring numbers ending with 5 is a simple trick that you must have in your sleeve.

Step 1: Multiply the ones digit. i.e., 5 x 5 = 25

Step 2: Multiply the no. and the next no. i.e n(n+1).

Now write the two no.s together and that's the final answer you'll obtain.

e.g 35^2

5 x 5 = 25

Now 3(3+1) = 3(4) =12.

Writing the no.s together we get the answer 1225. which is the square of 35.

Now try to re-trace the same pattern in the above picture.

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Multiply any number between 11 and 19

Step 1. Add the unit digit of smaller no. to the larger numeral.

Step 2 . Multiply the result by 10.

Step 3. Multiply the unit digits of both numbers.

Step 4. Add both the numbers (involve in step 2 & step 3).

E.g 12 x 15

15+2=17

17x10=170

5x2=10.

So 170+10=180

And there you have it. You can check it out with a calculator.

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