Question

Amar consumed 100 laddoos from Monday to Friday. Each day he consumed 6 more laddoos than the previous day. How many laddoos did he consume on Wednesday?

• A. 15
• B. 20
• C. 25
• D. None of these

Hint:

When daily amounts increase by a fixed number, model with an arithmetic progression and use the sum.

Answer 1

The Correct Option is B

Let Monday’s amount be \(x\). Then the 5-day arithmetic progression is:
\(x,\ x+6,\ x+12,\ x+18,\ x+24\).
Sum \(=5x+60=100 \Rightarrow 5x=40 \Rightarrow x=8\).
Wednesday’s amount \(=x+12=8+12= \boxed{20}.\)