Question:
Find the next number in the series 125, 80, 45, 20, ....
Find the next number in the series 125, 80, 45, 20, ....
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Try writing each term as 5 times a perfect square.
Updated On: Jul 3, 2026
- 15
- 5
- -10
- -5
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The Correct Option is B
Solution and Explanation
Step 1: Find the differences between consecutive terms: \( 80-125=-45 \), \( 45-80=-35 \), \( 20-45=-25 \).
Step 2: The differences increase by 10 each time: -45, -35, -25, so the next difference is -15.
Step 3: Next term \( = 20 + (-15) = 5 \). Answer: option 2.
Step 2: The differences increase by 10 each time: -45, -35, -25, so the next difference is -15.
Step 3: Next term \( = 20 + (-15) = 5 \). Answer: option 2.
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