Arithmetic Progressions Quiz 10

Sum of 10 arithmetic means between 3, 10 is

Sum of 4 arithmetic means between 3 and 23 is

Sum of first 100 odd numbers is

$1^2+2^2+3^2+......+100^2 = ........$

Sum to ‘n’ terms of 1, 8, 27, 64, ……

Sum to ‘n’ terms of 3.5 + 4.7 + 5.9 + ……..

(1) + (1 + 3) + (1 + 3 + 5) + upto ‘n’ terms = …………

Which of the following geometric pro-gressions has the common ratio as $\sqrt2\,?$

An employee got Rs 300 per month in his 11th year service and got Rs 495 per month in his 24th year service. If his monthly salary is in A.P., then what is his initial salary ? What is his incriment ?

Sum of first n terms of 1.4 + 4.7 + 7.10 + 10.13 + ……………… is