56
Because 8 times 7 = 56
7 x 8 = 56
To find out whether a no. is divisible by 7, we must: a) separate the units place: eg. 84 = 8 4 b) then double the no. in units place 4 x 2 = 8 c) subtract it from the no. formed by the remaining digits 8- 8 = 0 Then if the obtained no. is divisible by 7 (0= 7x0) , then the original no. is also divisible. ( 12 x 7 = 84 )
No. Its prime factors are 7 and 3; the sole prime factor of 8 is 2, therefore 42 cannot be divisible by 8.
56
No - 7/8 = 0.875
The only prime number divisible by 7 is 7. There are no prime numbers divisible by 8.
7
840 is the smallest number that is divisible by 5 6 7 and 8.
Because 8 times 7 = 56
7 x 8 = 56
To find out whether a no. is divisible by 7, we must: a) separate the units place: eg. 84 = 8 4 b) then double the no. in units place 4 x 2 = 8 c) subtract it from the no. formed by the remaining digits 8- 8 = 0 Then if the obtained no. is divisible by 7 (0= 7x0) , then the original no. is also divisible. ( 12 x 7 = 84 )
7, 240
1, 2, 4, 5, 7, 8
No. Its prime factors are 7 and 3; the sole prime factor of 8 is 2, therefore 42 cannot be divisible by 8.
504 is divisible by all those numbers.