Question
The digits of a two-digit number add up to 9. If 27 is
subtracted from the number, the digits switch places. What is the number?Solution
ATQ,
Let the digits be 'a' (ones) and 'b' (tens).
Original number = 10b + a
Reversed = 10a + b
Given:
a + b = 9 --------- (I)
And, 10b + a - 27 = 10a + b
⇒ 9b - 9a = 27
⇒ b - a = 3 --------- (II)
Add (I) and (II):
a + b + b - a = 9 + 3
⇒ 2b = 12 ⇒ b = 6
Then a = 3
Required number = 10 × 6 + 3 = 63
Tiger is a beautiful animal faced with a serious threat of extinction unless adequate efforts are not made in this direction which will indeed pave way ...
From on of the windows of my flat I can see the Qutub minar,” said my friend.
It calls for the importance of reskilling in order to prepare current and future workforces for the job of the future.
The State is ahead in the agriculture sector and is expected to become self-reliant in food grain production in three to four years.
He completely broke up / when he heard / that he did / not clear the test.
Identify the segment in the sentence, which contains the grammatical error
No matter he tries hard he cannot play the guitar.
Flights leaving Honk Kong were disrupted/ for a second day, plunging the former British Colony/ deeply into turmoil as its stock market/ fell to a seven...
Identify the erroneous part of the sentence.
The committee / has decided / to postpone the meeting until next week / No error.
This is a water body created with the fresh water that cascades from the top of the mountains meeting the briny sea water on its banks.
...In these questions some of the sentences have errors and some have none. Find out which part of a sentence has an error and indicate it corresponding to...
