In a class of students, the first student has 2 toffees, second has 4 toffees, third has 6 toffees and so on. If the number of students in the class is 25, then the total number of toffees are divisible by ____________.

On simplification 1 – 2 + 3 – 4 + 5 – 6 - - - - + 101, we get

1 + 2 + 3 +………+ 50 equals

If in an A.P., the pᵗʰ term is q and the (p + q)ᵗʰ term is 0, then the qᵗʰ term is:

If in an A.P., Sₙ = qn² and Sₘ = qm², where Sᵣ denotes the sum of first r terms of the A.P., then $$S_q$$​ equals:

The first term and last term of an AP are 33 and -57 respectively. If there are 16 terms in the series, then what will be sum?

Sum of p terms of AP is q and sum of q terms of AP is p. Common difference of A.P. is:

The sum of all two digit numbers which when divided by 4, leave 1 as remainder is :

The 7th term from the end of the sequence -8, -5, -2, ......... , 88 is :

The square of the natural numbers are grouped as $$1^2,(2^2,3^2), (4^2,5^2,6^2),...,(..., 210^2)$$​

Which one of the following is correct in respect of the Question and the Statements?

Statement 1: The sum of the terms in the last group is 804660.

Statement 2: There are 20 groups in all.

Statement 3: The sum of all the terms till the last but one group is 2304415.

​The sum of all natural numbers from 75 to 97 is:​