Quantitative aptitude

Using the formula for compound interest, A = P(1 + r/100)^t, the total amount after 3 years is 5000(1.1)^3 = Rs 6,655, yielding an interest of Rs 1,655. Options like Rs 1,550 are incorrect because they underestimate the compounding effect that accumulates interest on previously earned interest over the three-year period.

The intersection symbol (∩) represents the common elements present in both set A and set B. Since the numbers 3, 4, and 5 are the only elements that appear in both sets, option B is correct. Option A is incorrect because it represents the union of the two sets, which combines all unique elements from both.

All listed numbers are perfect squares of consecutive integers; however 100 is the only one that is a three-digit square ending with two zeros, distinguishing it as the odd one out. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.

• !Option C is incorrect because 60 fails to account for the fractional portion of 7.5 from the first calculation, underestimating the final sum.
• !Options like Rs 1,550 are incorrect because they underestimate the compounding effect that accumulates interest on previously earned interest over the three-year period.
• !The intersection symbol (∩) represents the common elements present in both set A and set B.

Answer each from memory — you'll see instantly whether you're right and why.

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