Grade 8 Reasoning: Arithmetic reasoning

Theo borrows $320 for a club trip and adds $120 for supplies. After $40 is paid back, the rest is paid in $40 weekly instalments. How many weeks does that take?

Dev wants to swim 128 laps. Dev swims 4 laps per day for the first 4 days. To finish in 8 days, how many laps per day does Dev need for the next 4 days?

Aisha bikes at 16 km/h for 2 hours, then 9 km more. How far is that in all?

Callum scored 25% of the 64 points. How many points is that?

The keyboard costs $400 plus a $150 delivery fee. Liam pays $200 now. The rest is paid in $50 weekly instalments. How many weeks is that?

Hair is 40 cm long and grows one quarter of that starting length each year. How long is it after 4 years?

The temperature is -2°C and drops 12 degrees. What is the new temperature?

Samuel scored 30% of the 70 points. How many points is that?

Mateo needs $200 for art supplies and $100 for a class fee. A grant covers $50. The rest is saved at $50 a week. How many weeks does the saving take?

Hair is 100 cm long and grows one quarter of that starting length each year. How long is it after 3 years?