Arithmetic Sequencing and the Interest

The arithmetic mean between two terms in an arithmetic sequence is 42. If one term is 30, what is the other term?

• 50

• 52

• 54

• 56

What is the sum of 4+8+12+16+…........S₈?

• 140

• 142

• 143

• 144

What is the sum of 7+9+11+13....S₁₂^?

• 216

• 218

• 219

• 220

If three arithmetic means are inserted between 9 and 25, find the first of these arithmetic means?

• 13

• 17

• 18

• 19

A club collect P20 the first week, P30 the second week, and so on, increasing P10 each week for 25 weeks. How much is the fund after 25 weeks?

• P 3,000

• P 3,200

• P 3,500

• P 3, 600

A conference hall has 28 rows of seats, The last row contains 98 seats. If each row has two fewer seats than the row behind, how many seats are there in the first row?

• 40

• 42

• 43

• 44

What is the sum of 40+50+60....S₁₀ ^?

• 750

• 850

• 900

• 950

Kara borrowed $21,000 for 5½ years at an annual compound interest rate of 7.5% to buy a car.  What is the total amount she will repay the bank for the auto loan?

• $31258.30

• $10258.30

• $981750

• $27165

Aaron deposited $3,000 into a savings account. How much will Aaron have in his account after 5 yearsat an annual compound interest rate of 3¼%?

• $3520.23

• $520.23

• $4159.70

• $5482.14

A bank is offering 7% annual compound interest on a savings account.  If you deposit $1,500, what will be the total amount of money in your savings account after three years?

• $337.56

• $1837.56

• $31500

• $30000