Page 44 - Start Up Mathematics_6

6. Division algorithm
Dividend = divisor × quotient + remainder

Review Exercises

Multiple ChoiCe Questions
1. The product of first five whole numbers is:

(a) 0 (b) 120 (c) 24 (d) 10
2. The difference between the successor and predecessor of 37,45,129 is:

(a) 0 (b) 1 (c) 2 (d) 37,45,129
3. The product of the predecessor and successor of 99 is:
(a) 9,702 (b) 9,800 (c) 9,900 (d) 9,988
4. The product of two odd numbers is:

(a) an even number (b) an odd number (c) either even or odd (d) prime number
5. If a whole number is subtracted from 10, as well as added to 10, then the sum of the resulting
numbers is:
(a) 0 (b) 20 (c) 40 (d) 80

6. The product of a non-zero whole number and its successor is always:
(a) an even number (b) an odd number (c) a prime number (d) divisible by 5

solve Mentally
True or False
1. Every natural number is also a whole number.
2. Predecessor of an even natural number is always an odd natural number.
3. Successor of a two-digit number can never be a three-digit number.
4. The product of two whole numbers is 1 only if both of them are 1.

5. Division by zero is meaningless, hence it is not defined.
Fill in the Blanks
1. On multiplying any whole number a by 1 we get back ____________, hence 1 is called the
____________ of the whole numbers.

2. Since 8 – 2 ≠ 2 – 8, hence ___________ property is not true for subtraction of whole numbers.
3. According to the division algorithm, dividend = quotient × ____________ + remainder.
4. The _____________ property of addition of whole numbers states that on adding any two
whole numbers the result is again a ____________ number.
5. Since the whole numbers satisfy ____________ property of multiplication over addition, we
can say that 5 × (3 + _______) = 5 × 3 + 5 × 2.
6. When zero is divided by any natural number, the answer is always ____________.

Answer in One Word or a Line
1. Which whole number has no predecessor?
2. Is there any whole number having no successor?

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