Find a few numbers that leave a remainder of 2 when divided by 3 and a remainder of 2 when divided by 4. Write an algebraic expression to describe all such numbers.
Step 1: Numbers with remainder 2 when divided by 3 are of the form . Step 2: Numbers with remainder 2 when divided by 4 are of the form . Step 3: Find the LCM of 3 and 4. LCM(3, 4) = 12 Step 4: Numbers satisfying both conditions are of the form . Step 5: Verification: remainder , remainder remainder , remainder
Answer: Numbers that satisfy both conditions are 2, 14, 26, 38, 50, 62, ... The algebraic expression for all such numbers is , where is any non-negative integer.
Explanation
The chapter explains that numbers leaving remainder 2 when divided by 3 are of the form 3k + 2. Numbers leaving remainder 2 when divided by 4 are of the form 4m + 2. To satisfy both conditions simultaneously, we need numbers of the form LCM(3,4) × n + 2 = 12n + 2. Verification: 2 ÷ 3 = 0 remainder 2, 2 ÷ 4 = 0 remainder 2. Similarly, 14 ÷ 3 = 4 remainder 2, 14 ÷ 4 = 3 remainder 2.
Solution Steps
Step 1: Numbers with remainder 2 when divided by 3: 3k + 2
Step 2: Numbers with remainder 2 when divided by 4: 4m + 2
Step 3: Find LCM of 3 and 4 = 12
Step 4: Numbers satisfying both conditions: 12n + 2
Step 5: Examples: n=0 gives 2, n=1 gives 14, n=2 gives 26, etc.