Maths - General Airthmatic
21. The least number which is a perfect square and is also divisible by 10, 12, 15 and 18 is
- Option : D
- Explanation : LCM of (10,12,15,18) =180
Nearest perfect square divisible by 10,12,15, and 18 = 900.
22. Which of the following relations is wrong?
- Option : B
- Explanation : Since, 1 centimetre
=10-3 decametre.
so 1 centimetre =10-2 decametre is
wrong.
- Option : D
- Explanation : Let the marked price = 100 Rs. Cost price = 64 Rs. Selling price after 12% discount =100 -12% of 100 = 88 Rs. Profit Percentage =(88-64)/64 x l00 = 24/64 xl00 =375%
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