Q. Given a bar graph showing sales data for four quarters: Q1 - 200, Q2 - 300, Q3 - 250, Q4 - 350. What is the percentage increase in sales from Q1 to Q4?

Ans. To find the percentage increase, use the formula: ((New Value - Old Value) / Old Value) * 100. Here, New Value is Q4 (350) and Old Value is Q1 (200). Thus, the calculation is ((350 - 200) / 200) * 100 = (150 / 200) * 100 = 75%. The percentage increase in sales from Q1 to Q4 is 75%.

Q. Find the next number in the series: 2, 4, 8, 16, ...

Ans. The series is a geometric progression where each term is multiplied by 2. To find the next number, multiply the last term (16) by 2. Therefore, 16 * 2 = 32. The next number in the series is 32.