Math hint

Math tricks

Remainder + multiple of diviser = dividend

Ratio question: to find how many needed in a ratio find the proportion of the total for 1 then multiply it by what is needed

Example: 2:6:1 equals one dough 

How much of sugar for 21 dough 

2/9 of 21 is the answer

If for a rate question the distance is equal, the average rate equals 

(2 x rate1 x rate2)/(rate1+rate2)

Worker-days helps solve group questions

1/t +  1/t = inverse of total this is for done together questions