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  • Arithmetic Progression - 1
  • Cherry has 70 marbles with her. She buys 5 marbles every ...
Multiple choice

Cherry has 70 marbles with her. She buys 5 marbles every week. How many marbles will she have at the end of the seventh week?

  1. 100

  2. 105

  3. 110

  4. 115

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

7th term = dn + (a – d) = 5 × 7 + (75 – 5) = 35 + 70 = 105

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