Find the sum 
24+48+72+...+480

• 5280
• 9576
• 10080
• 5040

Find how many terms are in the series below:
7+13+19+25...=1044

• 16
• 17
• 18
• 19

Evaluate the arithmetic series described:
2 + (-2) + (-6) + (-10)..., S₁₀

• -160
• -328
• -320
• -336

Evaluate the arithmetic series described:
11 + 18 + 25 + 32..., S₇

• 225
• 450
• 384
• 224

Evaluate the arithmetic series described:
0 - 7 - 14 - 21..., S₁₇

• -959
• -1904
• -952
• -1918

Evaluate the arithmetic series described:
a₁ = 12, a_n = 64, Find S₁₄

• 1082
• 532
• 541
• 1064

Evaluate the arithmetic series described:
a₁ = 5, a_n = 145, Find S₁₅

• 1125
• 2255
• 2250
• 2258

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911
• -1449
• -2436
• -1218

Find the sum of first 20 even numbers.

• 400

• 410

• 420

• 430

Find the sum of all 4-digit numbers. 

• 49,495,500
• 50,500,500
• 333,456,700
• 21,444,321