Test: Quantitative Aptitude- 3 - GMAT MCQ

The best answer is E.

Try some numbers, x=2, y=1.
(10⁶ – 9²)² = 81. And it will work with any given number under the conditions given.

The best answer is C.

You can back-solve it. 264 marbles divided by 22 (answer C) is 12 marbles per person.
If two people join, there will be 24 people, 264/24 is 11, which is 1 marble less.

The best answer is C.

Try to back-solve the problem. (1430/22 = 65) people, if 45 came then there are 110 people.
(1430/110 = 13) apples, which is 9 apples less per person

The best answer is A.

You can use the answers to back-solve the question or you could write the equations.
Take 392 pastry goods and divide them by 28 customers, each one will receive 14 products.
If there were 49 customers, each one would receive (392/49 = 8), which is 6 less.

The best answer is B.

First, find the constant k. Plug in the numbers for X and Y, to receive 4 x 42 – 3k x 12 = 18 → k = (18 – 168)/36 = -25/6.

Now, plug in the value of Y to receive: 4 x 36 – 3kX = 18 → after a little math, X is equal to 10.08, therefore the approximate answer is 10.

The best answer is E.

First, find the constant k. Plug in the numbers to get k = 13 + 23.5 = 36.5.
Now, Y² = 36 → Y = 6 or (-6). Plug both numbers to get X = 30.5 or X = 42.5.
The best answer is E, (30.5)² = 930.25.