Question 1: Round 527 to 1 significant figure.

Answer: 500

Question 2: Round 0.0498 to 1 significant figure.

Answer: 0.05

Question 3: Calculate 3.76 x 10^4 rounded to 1 significant figure.

Answer: 4 x 10^4

Question 4: Estimate the population of a city listed as 3,572,000 using 1 significant figure.

Answer: 3,000,000

Question 5: Round the number 9876 to 1 significant figure.

Answer: 10^4

Question 6: A car's speed is 123 km/h. Round to 1 significant figure.

Answer: 100 km/h

Question 7: Estimate the total weight of a shipment weighing 1,245 kg using 1 significant figure.

Answer: 1000 kg

Question 8: A tower is 453 meters tall. Round to 1 significant figure.

Answer: 500 m

Question 9: A scientist records a measurement as 0.00678 grams. Round to 1 significant figure.

Answer: 0.007 g

Question 10: In a multi-step calculation, multiply 6.4 by 2.3 and then round the result to 1 significant figure. Show your working.

Answer: 15

Question 11: Identify and correct the mistake: Rounding 0.004567 to 1 sf gives 0.005.

Answer: The correct answer is 0.005, but the rounding should be to 0.005, which is correct. The mistake is assuming 0.004567 rounds to 0.005 directly; it should be 0.005 as the first significant figure is in the third decimal place.