1) The sum of three odd numbers is always--- a) Even b) odd c) Prime 2) The Factots of 56 are a) 1,2,6 b) 1,2,7,8,14,56 c) 1,2,4,7,8,14,28,56 3) LCM of 16,80 is a) 16 b) 80 c) 24 4) Write 24 as sum of two primes- a) 12+12 b) 11+13 c) 10+14 5) Is 3 a factor of 38 a) Yes b) No 6) Write 84 as sum of twin primes a) 34+67 b) 41+43 c) 40+40 7) LCm of co- prime numbers is always its a) Product b) difference c) addition 8) Is 225 a multiple of 35 a) yes b) no 9) The Prime factorization for 112 is a) 2*2*7 b) 2*2*2*2*7 c) 3*2*5* 10) HCF of 120,500 is a) 22 b) 20 c) 30 11) Write 71 as sum of three odd primes a) 29,31,16 b) 19,23,29 c) 19,22,21 12) Are 15 and 29 co-primes a) yes b) no c) equal

Math Wizz g5

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