Fill ups

Fill ups . multiple of a number is the number itself. (v) TWO prime numbers are said to be (vi) The natural number I is num ber. (vii) 2 is the (viii) Two numbers are said to be . prime . primes if they differ by 2. . ...1.1&1..... composite prime number (ix) A number which is not divisible by 2 is called an . if they don't have a common factor other than 1. . number. (x) There is no Write multiples of 13, between 60 and 100. prime number. 3. 4. Answer the following . (i) Write a pair of twin primes between 65 and 100. (ii) Write any three pairs of twin primes between 1 and 40. (iii) Write the 3-digit smallest pair of twin primes. (iv) What is the test of divisibility by 3?

H i, (i v) f i r s t (v) t w i n p r i m e s (v i) n e i t h e r, n o r (v i i) s m a l l e s (v i i i) c o - p r i m e (i x) o d d (x) l a r g e s t 3 r d a n s w e r i s c o r r e c t, 4 t h; - (i) (71, 73) (i i) (3, 5), (5, 7), (11, 13) (i i i) (101, 103) (i v) s u m o f d i g i t s m u s t b e d i v i s i b l e b y 3 l i k e 15, 1 + 5 = 6 a n d 6 i s d i v i s i b l e b y 3 s o 15 i s a l s o d i v i s i b l e b y 3

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