Correct Answer: Potassium

Solution : The correct option is potassium.

Potassium (K) reacts violently with cold water. When potassium comes into contact with water, it undergoes a highly exothermic reaction, producing hydrogen gas and forming a solution of potassium hydroxide. This reaction is more pronounced with alkali metals like

Correct Answer: Imprudence

Solution : The correct choice is the second option.

Imprudence is the correct spelling, and it means the quality of not being wise. It is because one fails to consider the consequences of one's actions.

Other words "Imprudanse", "imprudance", and "imprudense" are incorrectly spelled.

Correct Answer: 40

Solution : Time taken by A to complete 25% of a work = 10 days
Time taken by A to complete the work = $10×\frac{100}{25}$ = 40 days
Part of work done by A in a day = $\frac{1}{40}$
Time taken by B to complete 40% of

Correct Answer:

Solution : On comparing the question figure and all the option figures, the following figure will combine and make the complete pattern –

Hence, the third option is correct.

Correct Answer:

Solution : According to the given figure series –
In each figure number of cubes increases by 1 as compared to the previous figure.
So, following the above pattern, the required figure will be as follows –

Therefore, the figure given in the fourth option is the required

Correct Answer: 385 metre²

Solution : Given: The length of two parallel sides of a trapezium is 15 metres and 20 metres.
Height = 22 metres
We know, Area of a trapezium = $\frac{1}{2}$ × Sum of two parallel sides × Distance between the parallel sides
⇒ Area of

Correct Answer: (4)

Solution : The fourth option is the correct choice.

There is no error in this sentence. The sentence is in the present tense, stating that the subject reads a great deal of books.

Therefore, the correct answer is no error.

Correct Answer: played badminton, are you good?

Solution : The correct choice is the third option.

After "seen", the base form of the verb should be used as see is a verb of perception. Using "played" (past tense) is incorrect in this context as the speaker is trying to

Correct Answer: INR 1,152

Solution : Given,
Principal borrowed by A from B = INR 3,600
Rate of interest charged by B on loan = 20% per year (simple interest)
Time for which A borrowed from B = 2 years
A lent 75% of the borrowed amount to C at

Correct Answer: –37

Solution : Given:
25, 23, 19, 11, –5, ?

In the above-given series, subtract twice the difference of the previous two numbers from the next number.
25 – 2 = 23;
23 – (2 × 2) = 23 – 4 = 19;
19 – (4 × 2)