**Numbers Quiz***(CTET/Class6/Class7/Class 8)*

**Q1: 2, 4, 6, 8, 10 ... are**

(a) prime numbers

(b) even numbers

(c) odd numbers

(d) none of these

**Q2: The roman number CD in decimal form is**

(a) 100

(b) 500

(c) 400

(d) 0

**Q3: Total number of prime numbers up to 100 are:**

(a) 20

(b) 24

(c) 25

(d) 28

**Q4: The only even number which is prime**

(a) 2

(b) 0

(c) 0 and 2

(d) none

**Q5: If 'p' is an odd number, 'q' is an even number and 'r' is an odd number. Then p+q+r is**

(a) odd number

(b) even number

(c) any non-prime number

(d) always a prime number

**Q6: The two numbers which have only '1' as the common factor are called**

(a) prime numbers

(b) composite numbers

(c) primary numbers

(d) co-prime numbers

**Q7: The two consecutive natural numbers will always be**

(a) odd numbers

(b) composite numbers

(c) co-primes

(d) even numbers

**Q8: The smallest number of four digits is:**

(a) 0001

(b) 0010

(c) 1000

(d) 1001

**Q9: The product of two prime numbers is**

(a) composite number

(b) prime number

(c) odd number

(d) even number

**Q10: In the series 13,16,49,169, 256, ... what shall be the next number**

(a) 512

(b) 169

(c) 361

(d) 289

**Q11: Sum of of first 'n' even numbers is:**

(a) n×(n+1)/2

(b) n×(n+1)

(c) n

^{2}

(d) n

^{2}+1

Answers:

1: (b) even numbers

2: (c) 400

3: (c) 25

4: (a) 2

5: (b) even number

6: (d)co-prime numbers

7: (c) co-primes

8: (c) 1000

9: (a) composite number

10: (b) 169

11: (b) n×(n+1)

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