🧮 Arithmetic

Explanation: Compound interest is calculated as A = P(1 + R/100)^T where P=principal, R=annual rate, T=time in years. CI = A - P.

Explanation: The sum of the interior angles of any triangle is always 180°. This is a fundamental theorem in Euclidean geometry.

Explanation: The Highest Common Factor (HCF) of 18 and 24 is 6. Factors of 18: 1,2,3,6,9,18. Factors of 24: 1,2,3,4,6,8,12,24. The highest common factor is 6.

Explanation: 25% of 400 = (25/100) × 400 = 0.25 × 400 = 100. A quick way: 25% = 1/4, so 400 ÷ 4 = 100.

Explanation: The Least Common Multiple (LCM) of 4 and 6 is 12, the smallest number divisible by both. Multiples of 4: 4,8,12... Multiples of 6: 6,12...