Category: Mathematical Logic & Set Theory
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Did you know that multiplying any three-digit number by 7 × 11 × 13 results in a number that is exactly twice the original number repeated? 123 * 7*11*13 = 123123 563 * 7*11*13 = 563563 785 *7*11*13 = 785785
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How to Subtract 5 from Two-Digit Numbers by Summing the Unit Number Subtracting numbers can sometimes be tricky, especially when dealing with two-digit numbers. However, there’s a simple and effective method to subtract 5 from any two-digit number by using the concept of summing the unit number. Let’s explore this method step-by-step. Understanding the Method…
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KNOWN WAY To divide a large number by 9 easily, you can use the fact that a number is divisible by 9 if the sum of its digits is divisible by 9. Here’s how: For example, with the number 3.752.247.929: LESS KNOWN WAY You can easily determine the remainder when dividing by 9 by using…
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To solve number sequences (or “strings” of numbers), you need to identify the pattern or rule that connects the numbers. Here’s how you can approach it: Example sequence: 10, 15, 25, 40, ? Step 1: Look at the numbers: 10, 15, 25, 40 Step 2: Are the numbers rising or dropping?10 → 15 (+5), 15…
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Mathematics is not only a subject in school that gives many people headaches. Nor is it a bunch of numbers, which are there without order or law. Mathematics is a special world in which some completely different laws rules – De Morgan’s laws, Pythagorean theorem, laws of algebra, tautology etc. Walking with me in this…
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Equations with two variables can be solved when we have at least two different equations involving those variables. This is because having two equations allows us to find the values of both variables. There are two common methods to solve such systems: substitution and elimination (also called opposite factors). In the substitution method, we solve…