PSAT MATH PRACTICE TEST

About "PSAT Math Practice Test"

PSAT Math Practice Test :

Here we are going to see some sample questions for PSAT exams. For each and every questions, you will have solutions with step by step explanation.

PSAT Math Practice Test  - Practice questions

Question 11 :

If 8575  =  5^x ⋅ 7^y, what is (xy) - 5 ?

Solution :

First, let us find the prime factors of 8575.

8575  =  5² ⋅ 7³

x = 2 and y = 3

xy - 5  =  2(3) - 5

  =  6 - 5

  =  1

Hence the answer is 1.

Question 12 :

When d is divide by 8, the remainder is 3. What is the remainder when d + 3 is divided by 8 ?

Solution :

Let d = 11

Here we choose 11, because it is greater than 8, when we divide 11 by 8, we get the remainder 3.

Then d + 3  =  11 + 3  =  14

By dividing this d + 3 by 8, we get 6(3 + 3) as remainder.

Hence the answer is 6.

Note : The number chosen should be 3 more than the multiple of 8.

Now let us see the next example on "PSAT Math Practice Test".

Question 13 :

Tommy is making as 6 letter password using only the letters A, B, C, D, E and F. How many different codes can Tommy make, if every letter can only be used once in each code ?

Solution :

Let us mark 6 blank spaces.

____  ____  ____  ____  ____  ____

The first letter chosen be placed in any of the above 6 dashes.

Now, we have remaining 5 letters.

The second letter chosen, out of 5 may be placed in any one of the remaining 5 places.

In this way, we may create 6! codes by using 6 letters.

Hence the answer is 720.

Question 14 :

-5 (x -3) ≥ 20 what is the solution to the inequality shown above ?

Solution :

-5 (x -3) ≥ 20

-5x + 15  ≥ 20

Subtract 15 on both sides, we get 

-5x ≥ 20 - 15

-5x ≥ 5

Divide by -5 on both sides, we get

x ≤ -1

Question 15 :

Which numbers line below shows the solution to the inequality -2 < x/3 ≤ 2 ?

Solution :

  =  -2 < x/3 ≤ 2

Multiply the entire inequality by 3. So we get,

  =  -6 < x ≤ 6

The fourth option represents the the solution which is greater than -6 and less than or equal to 6.

Question 16 :

There are 15, 000 teens whose favorite genre is comedy. How many teens have a favorite genre of action ?

Solution :

Number of teens have a favorite genre of action 

  =  30% of 15000

  =  (0.30) 15000

  =  4500

Question 17 :

A computer originally prices at $550.50 is on sale for 20% off. Jamie used a 5% discount coupon which was applied to the sales price. How much did Jamie pay for the computer ?(Assume there is no tax)

Solution :

Original price of computer  =  $550.50

From the 100% of price, the shop is going to give 20% off. Hence we have to pay 80% of the original price for the computer.

80% of 550.50  =  $440.40

Again we have 5% discount, so we have to calculate 95% of discounted price.

0.95 (440.40)  =  418.38

Hence the final amount for the computer is 418.38.

Question 18 :

Given the following value 4, 760 solve the following, x²/y, if x represents the smallest prime factor of the given value and y represents the greatest prime factor of the given value.

Solution :

4760  =  2 ⋅ 2 ⋅ 2 ⋅ 5 ⋅ 7 ⋅ 17

Smallest prime factor  = 2, largest prime factor  =  17

  x²/y  =  2²/17  =  4/17

Hence the answer is 4/17.

Question 19 :

An adult male Diptera has a mass of 11.5 milligrams. What is the Diptera's mass in grams?

Solution :

1000 milli grams  =  1 gram

  =  (11.5/1000) grams

  =  0.0115 grams.

Question 20 :

Michel has a project due in exactly 83 hours. It is currently 8 : 30 on Monday morning. What time is his project due ?

Solution :

Every day consists of 24 hours, we have three consecutive days and 11 hours remaining.

Since he starts the project at 8 : 30 on Monday, he has remaining 15.30 hours.

Monday (8:30 A.M) to Tuesday (8 : 30 A.M)  ==> 24 hours

Tuesday (8:30 A.M) to Wednesday (8 : 30 A.M)  ==> 24 hours

Wednesday (8:30 A.M) to Thursday (8 : 30 A.M)  ==> 24 hours

In Thursday morning 8 : 30 to evening 8 : 30, we have 12 hours, but he finish the given work at exactly 7 : 30 P.M

After having gone through the stuff given above, we hope that the students would have understood "PSAT Math Practice Test". 

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