Current Affairs 1st Class

Category : 1st Class

 APPLIED MATHEMATICS

In this chapter, we will apply our mathematical knowledge to solve various problems.

Some of these problems, along with their solutions are given below.

•          Example:

How many circles are there in the figure?

(a) 10                                                                (b) 12          

(c) 13                                                                (d) 14

(e) None of these

Answer (a)

Explanation: Clearly in the figure, number of circles are \[\text{ }\!\!|\!\!\text{ }\,\,\text{ }\!\!|\!\!\text{ }\,\,\text{ }\!\!|\!\!\text{ }\,\,|\,\,|\,\,\text{ }\!\!|\!\!\text{ }\,\,\text{ }\!\!|\!\!\text{ }\,\,\text{ }\!\!|\!\!\text{ }\,\,|\,\,|\,=10\]

So, correct option is (a).

•          Example:

Fill in the blanks with correct symbol.

(a) <                                                                 (b) >           

(c) =                                                                 (d) All the above

(e) None of these

Answer (a)

Explanation: Clearly left figure is smaller than the right figure.

So, correct option is (a).

•          Example:

Solve the following and choose the correct option.

(a)                                                              (b)

(c)                                                   (d)

(e) None of these

Answer (b)

Explanation: Here, 4 number of roses are removed from 6 number of roses.

So, remaining roses are\[6-4=2\].

Hence option (b) is the answer.

•          Example:

Arrange the numbers given in the following circle in ascending order.

(a) 22, 32, 29, 35, 36                                                      (b) 29, 32, 22, 35, 36

(c) 36, 35, 32, 29, 22                                         (d) 22, 29, 32, 35, 36

(e) None of these

Answer (d)

Explanation:

In ascending order, we arrange the numbers in their increasing order.

So, the order is 22, 29, 32, 35, 36.

Hence option (d) is the answer.

•          Example:

Fill in the boxes.

(a) 6, 9                                                              (b) 9, 8          

(c) 8, 9                                                              (d) 8, 0

(e) None of these

Answer (c)

Explanation: Since, 8 tens = 80 and 9 ones = 9

\[\therefore 8\text{ }tens+9\text{ }ones=89\].

Hence option (c) is the answer.

•          Example:

Look at the following calendar carefully.

Which day will be on 24th September 2017?

(a) Tuesday                                                        (b) Saturday

(c) Friday                                                           (d) Sunday

(e) None of these

Answer (d)

Explanation: Clearly 24 lies in the column of Sunday so on 24th September, the day will be Sunday.

Hence option (d) is the answer.