Olympiad Test Level 1: Fun With Numbers - Class 3 MCQ

Place value of 9 in 6593 = 90

Difference between both

= 6000 – 90 = 5910

After interchanging the digits, new number = 6745

Thus difference = 6745 – 6547

= 198

The greatest four-digit number using digits 3, 6, 8 and 0 without repetition is 8630

• For a 4-digit number, choose the highest digit in the thousands place: 8
• From the remaining digits (0, 3, 6), pick the next largest for hundreds: 6
• Select the next highest of (0, 3) for tens: 3
• The only digit left, 0, occupies the ones place
• This arrangement, 8630, is the greatest possible without repetition

The greatest two-digit number is 99.

The smallest one-digit number is 1.

To find the sum:

• 99 (greatest two-digit number)
• + 1 (smallest one-digit number)

The result is:

• 100

Largest odd digit = 9

Number = 89

The place value of the underlined digit in the number 3467 is 60.

The digit 6 is in the tens place. Its value is determined by its position in the number:

• The digit 3 is in the thousands place (3000).
• The digit 4 is in the hundreds place (400).
• The digit 6 is in the tens place (60).
• The digit 7 is in the units place (7).

Thus, the place value of 6 in 3467 is 60.

To find the smallest three-digit number:

• Consider the numbers: 571, 517, 715, 175.
• Arrange them in ascending order:

175 < 517 < 571 < 715

• The smallest three-digit number is 175.

To determine the largest number Reena can create with the digits 4, 7, 9, and 5, placing 9 in the ten's place:

• The digits available are 4, 7, 9, and 5.
• Since 9 is fixed in the ten's place, we will focus on the remaining digits: 4, 7, and 5.
• To form the largest number, we should arrange the remaining digits in descending order:
• The largest digit is 7, followed by 5 and then 4.
• Thus, the arrangement will be:
• First digit: 7
• Fixed ten's place: 9
• Next digit: 5
• Last digit: 4
• This gives us the final number: 7594.

Place value of 4 in 3451 = 400

Face value of 4 in 3451 = 4

Difference between both = 400 – 4 = 396

To determine the largest three-digit number:

• Compare the numbers: 398, 983, 839, and 893.
• Order them from smallest to largest: 398 < 839 < 893 < 983
• The largest number is 983.

There are 9 thousands in 9643.

The number 9643 can be broken down into its components:

• Thousands: 9
• Hundreds: 6
• Tens: 4
• Units: 3

Thus, in 9643, there are 9 thousands. This means that if you were to group the number into sets of one thousand, you would have nine complete sets.

708 > 527 > 483 > 107 > 96

Subtract the smallest number from the biggest number given inside the triangle.

The solution to the problem is as follows:

• Identify the largest number: 88
• Identify the smallest number: 31
• Perform the subtraction: 88 – 31 = 57

Thus, the final result is 57.

= 50000 + 5000 + 400 + 30 + 2

The smallest whole number is 0.

Identifying the predecessor of a number N:

The predecessor of the number N is found by subtracting one from N. This can be expressed simply as:

• Predecessor of N: N - 1

This means that if you have any number N, its predecessor is always one less than that number.