Numerical Ability.pptx

1,487 views 38 slides Sep 18, 2023
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About This Presentation

A numerical reasoning test is an aptitude test measuring ability to perform calculations and interpret data in the form of charts. There are five common types of numerical reasoning tests: calculation, estimation, number sequence, word problem, and data interpretation. Most of them are in multiple-c...


Slide Content

Numerical Ability Prof. Samruddhi Chepe

Some areas- Number Series Height & Distance Average Percentage Square Root Chain Rule Arithmetic Aptitude Simple Interest Numerical Reasoning Numerical Aptitude Probability Numerical Ability Compound Interest Multiplication Quiz Metric Unit Conversion Square and Cubic Conversion

Number Series In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much Look at this series: 2, 1, (1/2), (1/4), ... What number should come next? A.  (1/3) B.  (1/8) C.  (2/8) D.  (1/16)

Answer & Explanation: Answer: Option B Explanation: This is a simple division series; each number is one-half of the previous number. In other terms to say, the number is divided by 2 successively to get the next result. 4/2 = 2 2/2 = 1 1/2 = 1/2 (1/2)/2 = 1/4 (1/4)/2 = 1/8 and so on.

Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next? A.  7 B.  10 C.  12 D.  13

Answer & Explanation: Answer: Option B Explanation: This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

Look at this series: 36, 34, 30, 28, 24, ... What number should come next? A.  20 B.  22 C.  23 D.  26

Answer & Explanation: Answer: Option B Explanation: This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next? A.  22 B.  24 C.  25 D.  26

Answer & Explanation: Answer: Option C Explanation: In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next? A.  12 B.  14 C.  27 D.  53

Answer: Option B Explanation: In this series, each number is repeated, then 13 is subtracted to arrive at the next number.

Height & Distance

Average A grocer has a sales of Euro 6435, Euro 6927, Euro 6855, Euro 7230 and Euro 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Euro 6500? A.  Euro 4991 B.  Euro 5991 C.  Euro 6001 D.  Euro 6991

Answer & Explanation: Answer: Option A Explanation: Total sale for 5 months = Euro (6435 + 6927 + 6855 + 7230 + 6562) = Euro 34009. Required sale = Euro [ (6500 x 6) - 34009 ] = Euro (39000 - 34009) = Euro 4991.

The average monthly income of P and Q is Dollar 5050. The average monthly income of Q and R is Dollar 6250 and the average monthly income of P and R is Dollar 5200. The monthly income of P is: A.  Dollar 3500 B.  Dollar 4000 C.  Dollar 4050 D.  Dollar 5000

Answer & Explanation: Answer: Option B Explanation: Let P, Q and R represent their respective monthly incomes. Then, we have: P + Q = (5050 x 2) = 10100 .... ( i ) Q + R = (6250 x 2) = 12500 .... (ii) P + R = (5200 x 2) = 10400 .... (iii) Adding ( i ), (ii) and (iii), we get: 2(P + Q + R) = 33000 or P + Q + R = 16500 .... (iv) Subtracting (ii) from (iv), we get P = 4000. P's monthly income = Dollar 4000.

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is: A.  35 years B.  40 years C.  50 years D.  None of these

Answer & Explanation: Answer: Option B Explanation: Sum of the present ages of husband, wife and child = (27 x 3 + 3 x 3) years = 90 years. Sum of the present ages of wife and child = (20 x 2 + 5 x 2) years = 50 years. Husband's present age = (90 - 50) years = 40 years.

A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had: A.  588 apples B.  600 apples C.  672 apples D.  700 apples

Answer & Explanation: Answer: Option D Explanation: Suppose originally he had x apples. Then, (100 - 40)% of x = 420. 60/100 x x = 420 x = (420 x 100)/60 = 700.

A sum of money at simple interest amounts to 815 in 3 years and to 854 in 4 years. The sum is: A.  650 B.  690 C.  698 D.  700

Answer & Explanation: Answer: Option C Explanation: S.I. for 1 year = (854 - 815) = 39. S.I. for 3 years = (39 x 3) = 117. Principal = (815 - 117) = 698.

93296 - 45874 + 20382 - 56817 = ? A.     10387 B.     10587 C.     10787 D.     10987 Answer & Explanation Answer  : Option  D Explanation  : ? = 113678 - 102691 = 109887

Distance, Speed and Time Equation All the calculations in this section will be worked out using the  distance, speed and time equation . An easy way to remember the distance, speed and time equations is to put the letters into a triangle.

Speed, Distance and Time A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream. A.  2 hours B.  3 hours C.  4 hours D.  5 hours

Answer & Explanation: Answer: Option C Explanation: Speed downstream = (13 + 4) km/hr = 17 km/hr. Time taken to travel 68 km downstream = 68/17 hrs = 4 hrs.

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is: A.  8.5 km/hr B.  9 km/hr C.  10 km/hr D.  12.5 km/hr

Answer & Explanation: Answer: Option C Explanation: Man's rate in still water = (15 - 2.5) km/hr = 12.5 km/hr. Man's rate against the current = (12.5 - 2.5) km/hr = 10 km/hr.

Metric Unit Conversion Which is larger: 15 square metres or 15 000 square millimetres? A.  15 square metres B.  15 000 square millimetres C.  they are the same

Answer & Explanation: Answer: Option C Explanation:

6 square metres is equal to how many square kilometres? A.  60 square kilometres B.  0,0006 square kilometres C.  0,000006 square kilometres

Answer & Explanation: Answer: Option C Explanation:

5 square kilometres is what compared to 50 000 000 square metres? A.  smaller B.  larger C.  they are the same D.  can not be said from data

Answer & Explanation: Answer: Option A

Which word does NOT belong with the others? A.  inch B.  ounce C.   centimeter D.  yard

Answer & Explanation: Answer: Option B Explanation: An ounce measures weight; the other choices measure length.

Thank You!!!!