VTMO 2014 — Grade 3 — semifinal

Fill in the blank: $3\times2+4\times\ldots=30$.

An empty bottle weighs $250$ grams. When filled with water it weighs $480$ grams. How many grams of water does it hold?

The first tank contains $200$ liters of oil. The second contains $25$ liters less. How many liters are in both tanks?

A two-digit odd number has a tens digit three times its units digit. Which number could it be?

What is the difference between the smallest three-digit number with distinct digits and the largest two-digit number?

In a magical land, students learn this unusual operation: $5\heartsuit2=5+5-2-2$. Evaluate $9\heartsuit4=$

Find the dividend if the divisor is the greatest one-digit number and the quotient is $2$.

Today is Sunday. What weekday will it be in $30$ days?

How many minutes does a clock’s minute hand take to move clockwise from $2$ to $11$?

Minh weighs $4 \,\mathrm{kg}$ more than Lam. Nam weighs $3 \,\mathrm{kg}$ more than Lam. Which of Minh and Nam weighs more, and by how much?

Choose the expression with the greatest value.

Replace the question mark with the appropriate number in the figure.

Four people attend a party. On leaving, each person shakes hands once with every other person. How many handshakes occur?

Remove two digits from $415382$, keeping the others in order, to make the greatest possible number. Which digits should be removed?

The total age of An, Binh and Chi is $20$. What will their total age be in two years?

An has $10$ more candies than Binh. An gives Binh $3$ candies. How many more candies does An now have?

The total weight of $2$ ducks and $3$ cats equals the weight of $6$ cats. The weight of $2$ ducks and $6$ cats equals how many cats?

How many small cubes form the solid below, including hidden cubes?

During an outing for Titan Education’s “$9$-week challenge,” class $3 B$ lines up. Minh is tenth from the front and sixth from the back. How many pupils are in the line?

How many digits are needed to number a $36$-page book from page $1$?