Tell me some maths tricks
Answers
Trick 1: Multiplying a number by 5. To multiply a number by 5, simply divide the number by 2 and multiply it by 10. ...
Trick 2: Multiplying a double-digit number by 11. ...
Trick 3: Multiplying a number by 6. ...
Trick 4: Multiplying a number by 9. ...
Trick 5: Squaring a double-digit number ending with 5.
Answer:
1. Multiplying by 6
If you multiply 6 by an even number, the answer will end with the same digit. The number in the ten's place will be half of the number in the one's place.This ploy works effortlessly and students can add it to their collection of maths magic tricks!
Example
6 x 4 = 24
24
2. The Answer Is 2
Think of a number.
Multiply it by 3.
Add 6.
Divide this number by 3.
Subtract the number from Step 1 from the answer in Step 4.
The answer is 2.
2
3. Same Three-Digit Number
Think of any three-digit number in which each of the digits is the same. Examples include 333, 666, 777, and 999.
Add up the digits.
Divide the three-digit number by the answer in Step 2.
The answer is 37.
37
4. Six Digits Become Three
Take any three-digit number and write it twice to make a six-digit number. Examples include 371371 or 552552.
Divide the number by 7.
Divide it by 11.
Divide it by 13.
The order in which you do the division is unimportant!
The answer is the three-digit number.
Example
371371 gives you 371 or 552552 gives you 552.
A related trick is to take any three-digit number.
Multiply it by 7, 11, and 13.
The result will be a six-digit number that repeats the three-digit number.
456 becomes 456456
Step-by-step explanation:
hope helps