Unknowns and Variables

Q.

Verify by substitution that the solution(root) of:

$2x+5=11$ is $3$

Q. The value of $p+q+r=50$. If $p=12$ and $q=8$ then find the value of $r$.

1. $20$
2. $25$
3. $30$
4. $35$

Q. Sam, Jasmine and Merry decided to share 20 chocolates. Merry took 4 chocolates and Jasmine took three times as many as Sam. How many chocolates did Sam take?

1. $4$
2. $8$
3. $3$
4. None of the above

Q. Tom is an $x$-year-old boy. Determine Dennis's age in terms of Tom's age if he is four years younger.

1. $x$
2. $x-4$
3. $x+4$
4. $4x$

Q. In total, a Beetle's basket comprises $50$ flowers, including roses, lilies, and sunflowers. How many sunflowers are in the basket if there are $20$ roses and $15$ lilies?

Q. Francis and Marie worked together for $80$ hours. Francis worked thrice as many hours as Marie did. How many hours did they each work?

1. Francis: $60$ hours
   Marie: $20$ hours
2. Francis: $40$ hours
   Marie: $20$ hours
3. Francis: $20$ hours
   Marie: $60$ hours
4. Francis: $60$ hours
   Marie: $40$ hours