ASMO P5

ABCD + ACD + CD = 1668. Please find the sum of A, B, C, D

A total of 7 number cards from 1 to 7 are placed in order, assuming that the number cards 3 and 4 are taken out, then placed randomly but must be next to each other. How many different ways to place the cards in total?

There are 25 questions in the Mathematical Olympiad, 4 points are awarded for each correct answer, and 2 points are deducted for each wrong answer. Xiao Ming scored 76 points. How many questions did Xiao Ming get right?

How many squares are there in the picture without stars?

Calculate the following equation and give the answer in 1 decimal place.

24.3×99 + 25.7×102=

Uncle Hua went to buy a movie ticket. Buying one ticket left RM15, and buying two tickets left RM10. May I ask how much Uncle Hua brought?

The sum of the weights of boxes A, B, and C is 20 kg. Box B weight is three times the box A. Box B is half the weight of box C. Please find the product of boxes A, B, and C

Teacher Huang wants to buy a computer for office work. Computer A and computer B are worth RM452 in total, computer B and computer C are worth RM459 in total, and computer A and computer C are worth RM467 in total. Please tell Mr. Huang how much the cheapest computer is.

A rectangle’s length and width are both increased by 4 cm, then its’ areas increased 54 cm2 . What is the perimeter of the original rectangle?

Zhang Hua wants to buy 11 apples and 2 durians. Zhang Hua spent a total of RM79. It is known that the price of durian is eight times that of apples and less RM1. How much did Zhang Hua spend for the apples?