Math Kelas 7

1. State whether each of the following is true or false :
a. The prime numbers between 1 and 20 are 2,3,5,7,9,11,13,17 and 19
b. The HCF of 16,24 and 32 is 8
c. The smallest number that is divisible by 10,15 and 20 is
d. 1 725 when expressed as a product of prime factors 1s 23 x 15 x 5
e. 9 996 is divisible by 11 because 9+9+9+6 = 33 which is divisible by 11
f. The HCF of 4 x 32, 3 x 42 and 2 x 3 x 5 is 42 x 32 x 5An approximation of 892 is 8100 which is less than the exact value of 892