Mathematical Problem Solving Techniques

The video tutorial covers various math problems in preparation for the OSN competition. It includes route calculation, integer counting, geometry, cost calculation, algebraic problem solving, and data analysis. Each section provides step-by-step solutions to enhance understanding and problem-solving skills.

How many different routes can be taken from point M to point N?

• 5

• 6

• 8

• 7

How many integers between 100 and 400 contain the digit 2?

• 128

• 138

• 148

• 158

What is the area of a square with a perimeter equal to that of a triangle with sides 5 cm, 8 cm, and 5 cm?

• 20.25 cm²

• 18.25 cm²

• 22.25 cm²

• 24.25 cm²

If the total cost for costumes is Rp. 2,580,000, what is the cost for class A?

• Rp. 1,420,000

• Rp. 1,320,000

• Rp. 1,520,000

• Rp. 1,620,000

What is the least common multiple of 15 and a number if their greatest common divisor is 3?

• 75

• 105

• 45

• 60

How many ways can you choose 3 books and 2 pens from 5 books and 7 pens?

• 230

• 240

• 220

• 210

What is the average number of non-family members in the given data?

• 85

• 88

• 90

• 92

What is the total distance covered if Butet walks for 45 minutes at 4 km/h and runs for 30 minutes at 10 km/h?

• 6 km

• 8 km

• 9 km

• 7 km

If the third quarter sales are 20% of the annual total, what is the fourth quarter sales?

• 7.5

• 6.5

• 5.5

• 8.5

What is the area of region B if it is divided into four equal parts with a total area of 2.5 cm²?

• 23.75 cm²

• 26.75 cm²

• 24.75 cm²

• 25.75 cm²