Question

How many numbers between 1 and 100 are multiples of both 2 and 7

Answer 1

7. The formula is : $98-14=84$ and then $\frac{84}{14}$ and then $6+1=7$.

The reason behind it is 14 is the least common multiple of 7 and 2 and 98 is the largest 2 digit multiple of 14. Subtract 98 and 14 and then divide by 14 to get 6 and then add 1. You will get 7 which is our answer!