Question
In an arithmetic progression, the first term is 4 and
the sum of the first 20 terms is 650. Find the common difference.Solution
For AP, sum of n terms: Sₙ = (n/2)[2a + (n − 1)d] Given: n = 20, a = 4, Sₙ = 650 650 = (20/2)[2×4 + 19d] 650 = 10[8 + 19d] Divide both sides by 10: 65 = 8 + 19d 19d = 65 − 8 = 57 d = 57 / 19 = 3
This question consists of a sentence that is divided into four parts numbered (1) to (4). Only one part of the sentence is not acceptable in standard w...
At the vary centre of the Galaxy lies a remarkable object—a massive black hole surrounded by an accretion disk of high-temperature gas.
Directions: In each of the questions, a sentence has been divided into four parts, one of which may contain an error. Identify that fragment and mark i...
Read the given sentence to find out whether there will be error in any of the two parts, mark the parts in which there will be error as answer from the ...
In each of the questions, a sentence has been divided into four parts, one of which may contain an error. Identify that fragment and mark it as your an...
The monk loved (1)/ riding and hunting and refused(2)/ to conform by rules and regulations(3)/ of the ancient monastic order.(4)
In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option...
He had a “fruitful discussion” in the “senior-most leader of the country.
- In the following questions, one part of the sentence may have an error. Find out which part of the sentence has an error and choose the option correspondin...
 In each of the questions, a sentence is divided into five parts A, B, C, D and E in which two of the parts have some grammatical or contextual errors...
Relevant for Exams:
