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GMAT OG 2020 Quant Questions and Solutions

A 10 minute read

GMAT OG 2020 witnessed the addition of 123 new questions and removal of 23 old questions, thereby increasing the questions by 100 to a total of 907. The most number of questions have been added to Data Sufficiency, i.e., 59 and 3 old questions have been removed increasing the total number of questions in DS

On a scale drawing, a rectangle 1 inch by 1(1/3) inches represents the floor of a room and the indicated scale is 1-inch equals 15 feet. How many square tiles 6 inches on a side will be needed to cover this floor? (1 foot = 12 inches) – OG 2020 Question #100 with Solution

A < 1 minute read

Solution Given: Dimensions of the rectangular floor = 1 inch by 1(1/3) inches 1 inch = 15 feet 1 feet = 12 inches To find: The number of square tiles 6 inches on a side will be needed to cover this floor. Approach and Working: Dimensions of the rectangle in feet= 1 * 15

In the floor plan of an executive’s beach house above, the north and south walls of the living room are parallel. What is the floor area, in square feet, of the bedroom? – OG 2020 Question #99 with Solution

A < 1 minute read

Solution Given Let us name the point in the diagram as shown below: AE = 30 ft BE = 30 ft CF = 15 ft AD = 30 ft CD = 30 ft To Find: Area of Bedroom or ∆ACD Approach and Working: Since EF is parallel to BC, So, two corresponding angles

Three-fourths of the area of a rectangular lawn 30 feet wide by 40 feet long is to be enclosed by a rectangular fence. If the enclosure has full width and reduced length rather than full length and reduced width, how much less fence will be needed? – OG 2020 Question #98 with Solution

A < 1 minute read

Solution Given In this question, we are given A rectangular lawn is 30 feet wide and 40 feet long. Three-fourth of the area of the lawn is to be enclosed by a rectangular fence. To Find We need to determine The less amount of fence required, if the enclosure has full width and reduced

In quadrilateral ABCD above, what is the length of AB? – OG 2020 Question #97 with Solution

A < 1 minute read

Solution Given In this question, we are given The diagram of the quadrilateral ABCD Length of AD = 1, DC = 3 and CB = 4 Angle BAD = angle DCB = 90° To Find We need to determine The length of AB Approach & Working In the given figure, if we add

If rectangle ABCD is inscribed in the circle above, what is the area of the circular region? – OG 2020 Question #96 with Solution

A < 1 minute read

Solution Given In this question, we are given Rectangle ABCD is inscribed in the circle, as shown in the given diagram. To Find We need to determine The area of the circular region Approach & Working As ABCD is a rectangle, we can say angle ADC = angle ABC = 90° Hence, we

The figure above shows a portion of a road map on which the measures of certain angles are indicated. If all lines shown are straight and intersect as shown, is road PQ parallel to road RS? – OGQR 2020 Question #222 with Solution

A 2 minute read

Solution Steps 1 & 2: Understand Question and Draw Inferences In this question, we are given: A portion of the roadmap Showing the measures of certain angles. All the lines shown in the figure are straight. We need to find: Whether road PQ is parallel to road RS. Per our conceptual understanding, when two parallel

The figure above shows a piece of cheese with a corner cut off to expose plane surface ABC. What is the area of surface ABC? – OGQR 2020 Question #221 with Solution

A 2 minute read

Solution Steps 1 & 2: Understand Question and Draw Inferences In this question, we are given: A figure having a piece of cheese from which a corner has been cut off. The removed corner exposes the plane surface ABC. We need to determine: The area of the surface ABC. The surface ABC is in the

If A is the area of a triangle with sides of lengths x, y, and z as shown above, what is the value of A? – OGQR 2020 Question #220 with Solution

A < 1 minute read

Solution Steps 1 & 2: Understand Question and Draw Inferences In this question, we are given: A right-angle triangle of area A Side lengths of the triangle are: x, y, and z. We need to find: The value of A. Now, the given triangle is a right-angled triangle. Hence, its area A = 1/2 *

The heart-shaped decoration shown in the figure above consists of a square and two semicircles. What is the radius of each semicircle? – OGQR 2020 Question #219 with Solution

A 2 minute read

Solution Steps 1 & 2: Understand Question and Draw Inferences We are given: A heart shaped decoration figure. It consists: A square and two semicircles. We need to find: The radius of each semicircle. Let us assume that r is radius of the semicircle. Hence, 2r is the side of the square as shown. Therefore,

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