**34**. The product of successor and predecessor of 999 is

- (A) 999000
- (B) 998000
- (C) 989000
- (D) 1998

**33**. By which of the following number, we cannot divide a whole number?

- (A) 2
- (B) –1
- (C) 1
- (D) 0

**32**. Which of the following is not defined?

- (A) 5 + 0
- (B) 5 – 0
- (C) 5 × 0
- (D) 5 ÷ 0

**31**. Which of the following statements is not true?

- (A) 0 + 0 = 0
- (B) 0 – 0 = 0
- (C) 0 × 0 = 0
- (D) 0 ÷ 0 = 0

**30**. The product of a non-zero whole number and its successor is always divisible by

- (A) 2
- (B) 3
- (C) 4
- (D) 5

**29**. 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 3

**28**. A whole number is added to 25 and the same number is subtracted from 25. The sum of the resulting numbers is

- (A) 0
- (B) 25
- (C) 50
- (D) 75

**27**. Which of the following is not true?

- (A) (7 + 8) + 9 = 7 + (8 + 9)
- (B) (7 × 8) × 9 = 7 × (8 × 9)
- (C) 7 + 8 × 9 = (7 + 8) × (7 + 9)
- (D) 7 × (8 + 9) = (7 × 8) + (7 × 9)

**26**. By using dot (.) patterns, which of the following numbers can be arranged in all the three ways namely a line, a triangle and a rectangle?

- (A) 9
- (B) 10
- (C) 11
- (D) 12

**25**. Number of primes between 1 and 100 is

- (A) 2
- (B) 3
- (C) 4
- (D) 5

**24**. Sum of the number of primes between 16 to 80 and 90 to 100 is

- (A) 20
- (B) 18
- (C) 17
- (D) 16

**23**. If *A* is a ten-digit number and *B* is a nine-digit number, then which among the following is true?

- (A)
*A*=*B* - (B)
*A*>*B* - (C)
*A*<*B* - (D) None of these

**22**. Which of the following is not true?

- (A) Natural numbers are closed under addition
- (B) Natural numbers are closed under subtraction
- (C) Natural numbers are closed under multiplication
- (D) None of these

**21**. Which of the following statements is not true?

- (A) Both addition and multiplication are associative for whole numbers.
- (B) Zero is the identity for multiplication of whole numbers.
- (C) Addition and multiplication both are commutative for whole numbers.
- (D) Multiplication is distributive over addition for whole numbers.

**20**. Which of the following is not true?

- (A) Addition is commutative for natural numbers
- (B) Multiplication is commutative for natural numbers
- (C) 1 is the identity for addition of whole numbers
- (D) 0 is the identity for addition of whole numbers

**19**. There is a whole number which when added to a whole number, gives the number itself. The number is

- (A) –1
- (B) 1
- (C) 0
- (D) 2

**18**. The smallest 6 digit natural number ending in 5 is

- (A) 10050
- (B) 10235
- (C) 10005
- (D) 10105