1) A number which has only two different factors is called a) Composite number b) Prime number c) Twin prime number 2) Two prime numbers whose difference is 2 are called a) Composite number b) Prime number c) Twin prime number 3) Which is the only even prime number? a) 2 b) 4 c) 3 4) Which of the following is not a natural number? a) 3+5-2 b) 4×0 c) 8÷8 5) The greatest 2 digit number exactly Divisible by 17 is a) 68 b) 91 c) 85 6) 162×0×1025 = a) 0 b) 162 c) 1025 7) 432+______ =111+432 a) 432 b) 111 c) 0 8) The smallest composite number is a) 2 b) 3 c) 4 d) 6 9) Prime factorisation of 27 is a) 1×27 b) 3×9 c) 3×3×3 10) Which pair of the following is twin prime? a) 2 , 3 b) 3, 5 c) 9, 11

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