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What are some mathematical tricks?
Pick any number. Multiply by 6. Add 13. Subtract 7. Divide 3. Divide 2. Then subtract by the original number you chose. Your result will always be 1. Tell a friend to mentaly multiply their age by 2. Tell them to add 14 then divide 2. Ask your friend what number they currently have. Now, you mentally subtract 7 from the number they tell you, then you'll know your friend's age.
What is number if you add 7 to number then divide result by number the answer is 8?
15
What if 5 is added to a number and the sum is tripled the result is 17 more than the number?
22
How do you turn 1.3 into a whole number?
Mulitiply it by 10, and you will have 13; divide by 0.1 and you will have 13 (again); or add 0.7 and you will have 2; or subtract 0.3 and you will have 1.
What is the reciprocal of -0.2?
To get the reciprocal of any number, just divide 1 by that number. To check the result: the number times its reciprocal must equal 1.
How do you get the percent of change?
Divide the new number by the original number, subtract '1', and multiply by 100.
What are some mathematical tricks?
Pick any number. Multiply by 6. Add 13. Subtract 7. Divide 3. Divide 2. Then subtract by the original number you chose. Your result will always be 1. Tell a friend to mentaly multiply their age by 2. Tell them to add 14 then divide 2. Ask your friend what number they currently have. Now, you mentally subtract 7 from the number they tell you, then you'll know your friend's age.
What number can you subtract half from to obtain a result that is zero?
The wording is ambiguous. If the questions means, "From what number can you subtract one-half to get a result of zero?" then the answer is one-half. (1/2) - (1/2) = 0 If the question means, "From what number can you subtract half of the number to get a result of zero?" then the answer is zero. 0 - (1/2)0 = 0
If you subtract a number from itself or divide a number by itself which will give you the largest?
Subtracting a number by itself will leave you with 0, whereas dividing leaves 1. So dividing a number by itself will give the larger result.
How is it possible to subtract a number from 100 and get a result that is greater than 100?
Subtract a negative, eg 100 - (-1) = 101.
What is the result if you pick a number from 1 to 9 and add this to the next higher number and add 9 and divide by 2 and subtract your starting number?
For the numbers 1 thru 9, the result is always 5. In fact, the result is 5 for any integer, and if you change the wording slightly to say 'add this to the original number plus 1' instead of 'add this to the next higher number' the result is 5 for ANY complex number. Here's why: Number picked: x Next higher number (for integers) or Number picked plus 1 (for any other sort of number): x + 1 Add them: x + x + 1 = 2x + 1 Add 9: 2x + 1 + 9 = 2x + 10 Divide by 2: x + 5 Subtract starting number: x + 5 - x = 5. Every tiime.
How do you work out one percent of a number?
Divide the number by 100. The result is 1% of the number.
How do you determine percentage of growth from one number to another?
You do the following: 1) Divide the second number by the first. This will give you a factor, for example 1.20. 2) Subtract 1 from the result. This gives you the increase as a factor, for example, 0.20. 3) Multiply the result by 100, to convert to a percentage. In this example, 20%.
What is number if you add 7 to number then divide result by number the answer is 8?
15
Is 22147483647-1 a prime number?
no because if you subtract it as you have seemed to show here then you get an even number which makes it possible to divide by 2
Formula of Celsius?
F to C Deduct 32, then multiply by 5, then divide by 9 C to F Multiply by 9, then divide by 5, then add 32 Answer 2: Here's a much easier way to do it: C to F: Double it, subtract 1/10 of the result, and add 32. F to C: Subtract 32, add 1/9 of the result, then divide by 2.
Number from 1-9 multiply by 2 add 12 subtract 4 divide by 2?
4 4
