IMO 2. Computation Operations

Which of the following is NOT true?

• 12 x 89 = 89 = 12
• 12 x 89 = 12 x (80 + 9)
• 12 x 89 = (10 + 2) x 89
• 12 x 89 = (12 x 8) + (12 + 9)

In the given abacus, if we add 2 beads at ten thousand's place and remove 3 beads from ones place, then the number formed is

• 959 x 48

• 230 x 141

• 606 x 72

• 103 x 144

Find the value of P and Q respectively.

• 41742, 74147

• 4645, 74147

• 41742, 78257

• 4645, 78257

Samarth has a ball of string 6 yards long. He needs 20 feet string for a project. What should Samarth do first to find out the length of string he had? (1 yard = 3 feet)

• Multiply 20 by 3
• Multiply 20 by 6
• Multiply 6 by 3
• Multiply 6 by 12

Which of the following shows the common factors of 12 and 15?

• 1 and 2
• 2 and 3
• 1 and 3
• 3 and 4

Product of 9 and third multiply of 4 is ______.

• 18
• 108
• 54
• 216

Which of the following Donald ducks shows number greater than 850 but less than 970?

• Q

• R

• P

• None of these

Priyanka read a book of 252 pages in a week. She read same number of pages each day. How many pages did she read each day?

• 42
• 32
• 34
• 36

Find the missing number.

• 2

• 3

• 6

• 4

Which of the following is a common factor of 24 and 46?

• 4
• 12
• 3
• 2