Question Details

3 1 3 × 5 1 5 × 13 11 13 = ?

What will come in place of the question mark (?) in the following questions?

Options

A

180

B

360

C

90

D

240

E

200

Show Answer

Correct Answer :

Option D

240

Solution :

The correct option is 240.


To find the value that comes in place of the question mark (?), follow these step-by-step calculations:


Step 1: Convert each mixed fraction into an improper fraction.

3 1 3 = ( 3 × 3 ) + 1 3 = 10 3

5 1 5 = ( 5 × 5 ) + 1 5 = 26 5

13 11 13 = ( 13 × 13 ) + 11 13 = 180 13


Step 2: Multiply the improper fractions together.

? = 10 3 × 26 5 × 180 13


Step 3: Simplify by canceling common factors in the numerators and denominators.

• Divide 10 by 5: 10 5 = 2

• Divide 26 by 13: 26 13 = 2

• Divide 180 by 3: 180 3 = 60


Now, multiply the simplified factors together:

? = 2 × 2 × 60 = 240


Thus, the correct value in place of (?) is 240.

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