Tag Archives: grade 6

Children Sharing Money

Al, Bee, Cecil, and Di have , and , respectively. Their father proposed that Al and Bee share their wealth equally, and then Bee and Cecil do likewise, and then Cecil and Di. Their mother’s plan is the same except … Continue reading

Posted in Problem solving | Tagged , | Leave a comment

Cottages on a Straight Road

There are four cottages on a straight road. The distance between Ted’s and Alice’s cottages is km. Both Bob’s and Carol’s cottages are twice as far from Alice’s as they are from Ted’s. Find the distance between Bob’s and Carol’s … Continue reading

Posted in Problem solving | Tagged , , | Leave a comment

Partners in Integers

Two integers are said to be partners if both are divisible by the same set of prime numbers. Find the number of positive integer less than that have no partners less than . Source: NCTM Mathematics Teacher, August 2006 Solution … Continue reading

Posted in Problem solving | Tagged , , , , | Leave a comment

Water in Glass Box

A glass box cm, closed on all six sides, is partially filled with colored water. When the box is placed on one of its sides, the water level is cm above the table. If the box is placed on one … Continue reading

Posted in Problem solving | Tagged , , , | Leave a comment

Making Triangles

You have six sticks of lengths , and cm. Find the number of noncongruent triangles that can be formed using three of these sticks as sides. Source: NCTM Mathematics Teacher, August 2006 Solution Three sticks make a triangle. There are … Continue reading

Posted in Problem solving | Tagged , , , , , , , | Leave a comment

Product of x-Intercepts

The line with equation and with equation are perpendicular. If neither passes through the origin, find the product of their -intercepts. Source: SCVMA Math Olympiad 2010 Solution Let point represent the -intercept of line Let point represent the -intercept of … Continue reading

Posted in Problem solving | Tagged , , , , , | Leave a comment

Five Same Numbers

You roll five fair, six-sided dice, all at the same time. In that one roll, what is the probability of getting five of the same number? Source: NCTM Mathematics Teacher, September 2006 Solution When you roll five dice at the … Continue reading

Posted in Problem solving | Tagged , , , , , , | Leave a comment

Two Equilateral Triangles

If two equilateral triangles of area intersect to form a regular hexagon, then what is the area of the hexagon? Source: NCTM Mathematics Teacher, September 2006 Solution If we subdivide an equilateral triangle into smaller congruent equilateral triangles as shown … Continue reading

Posted in Problem solving | Tagged , , , , | Leave a comment

Two Squares

If the vertices of square are the midpoints of the edges of square , then what is the ratio of the area of square to square ? Source: NCTM Mathematics Teacher, September 2006 Solution The diagonal of square divides square … Continue reading

Posted in Problem solving | Tagged , , , , , , , , , | Leave a comment

Rolling Wheel

If a wheel completes exactly revolutions while rolling feet, what is the diameter of the wheel? Source: NCTN Mathematics Teacher, September 2006 Solution The above figure shows the ground distance traveled by the rolling wheel of radius feet in revolutions. … Continue reading

Posted in Problem solving | Tagged , , , , , , , , | Leave a comment