Mathematical Concepts and Problem Solving

This video tutorial covers solutions to the 2021 National Common Entrance Examination questions. It includes topics such as converting numbers to Roman numerals, writing numbers in words, understanding place value, basic arithmetic operations, time and measurement conversions, simplifying square roots and fractions, and calculating discounts and percentages. The video aims to help students understand and solve these types of questions effectively.

What is the main focus of the video tutorial?

• Solving algebraic equations

• Biology experiments

• National Common Entrance Examination questions

• Physics concepts

How do you convert the number 478 into Roman numerals?

• CDLXXVIII

• CDLXVIII

• CDLXVI

• CDLXXVII

What is the first step in writing numbers in words?

• Multiply by ten

• Convert to Roman numerals

• Place commas appropriately

• Add all digits

What is the place value of 6 in the number 123.64?

• Hundredths

• Thousands

• Tenths

• Units

Which number is the smallest: 0, 12, 5, -12, -5?

• 0

• 12

• -5

• -12

If one sachet of a product costs 700, what is the cost of 20 sachets?

• 10,000

• 20,000

• 7,000

• 14,000

How many hours are there in 5 days?

• 100

• 150

• 200

• 120

Which of the following is a perfect square?

• 169

• 144

• 121

• 100

What is the simplified form of the square root of 36/25?

• 6/5

• 5/6

• 1/5

• 1/6

What is the result of 4 plus the square root of 16 minus 3?

• 8

• 5

• 6

• 7