What is the meaning of the following idiom? **As sharp as a tack**
Options:
- A: To be extremely sharp in a physical sense, like a blade
- B: To have a sharp object like a knife or a nail
- C: To be very dull or slow to learn
- D: To be very intelligent or quick to understand
Related Practice Questions:
- A sum of ₹4000 is invested at compound interest for 2 years at a rate of 10% per annum. What will be the total amount at the end of 2 years?
- At what rate of simple interest per annum will a sum of money double itself in 8 years?
- The difference between the compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is ₹25. Find the sum.
- The study of living organism :
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