How many rectangles are there in a 4x4 square grid?

Note: A square is also a rectangle.

How many different ways are there to get a sum of 80cents from two 50-cent, four 20-cent and eight 10-cent coin?

Find the value of  

khó trong tiếng anh là gì ấy nhỉ các bạn? giúp mình với .

A teacher has a bag of sweets to treat her class. If she gave 4 sweets to each student, then she would have 82 sweets left. If gave 9 sweets to each student, then she would have 2 sweets left. How many sweets are there?  

Andy made a playlist with 5 songs (A, B, C, D and E). Song A is 3 minutes long, song B is 2 minutes and 30 seconds, song C is 2 minutes, song D is 1 minute and 30 seconds, and song E is 4 minutes. The songs play in this order in a continuous loop. If Andy left the house when song C was just starting, what song was playing when he got back home 1 hour later?

Toby wrote down numbers from 1 to 100 on the whiteboard. Which digit appeared the least number of times?

If the five-digit number 24N14 is divided by 9, the remainder is 1. Find N

What is your favourit food? 

What is your favourit drink?

What is your favourit leeson?

Who is the friend who always"secretly loves to remember"?

Ai dịch được câu này mình vui lắm, hí hí!

Rồi trả lời luôn câu đó nha!

Thank you!