COURAGE শব্দটির বর্ণগুলি নিয়ে কতগুলি বিন্যাস সংখ্যা নির্ণয় করা যায় যেন প্রত্যেক বিন্যাসের প্রথমে একটি Vowel থাকে?
It takes 24 hours for 10 men to make 15 cakes. How many cakes can be made if 8 men work for 36 hours?
The ratio of present age of father, mother and son is 7:5:3. The sum of their ages is 75. What is the present age of the son in years?
How many prime numbers are there between 1 to 11?
What is the smallest positive integer that is evenly disvible by both 21 and 9?