Question

how many number lie between 11 and 1111 which when divide by 9 leave a remainder of 6 and when divided by 21 leave a remainder of 12​

Answer 1

Answer:

18

Step-by-step explanation:

I looked for the first three common numbers and found the answer to be 33, 96, 159 (all separated by 63)

I set up the equation 63x + 33 starting with x = 0

Then I substituted the numbers above in the equation and found that x<18 because if x>=18 then the number is greater than 1111

so 0<= x <=17

Count the integers 17-0 + 1 = 18