MEDIUM
11th ICSE
IMPORTANT
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Find the sum of first 24 terms of the A.P. a1, a2, a3, …; given that a1+a5+a10+a15+a20+a24=225.

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Important Questions on Sequences and Series

HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 18
Find three numbers in A.P. whose sum is 21 and the product is 315.
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 18
The sum of three numbers in A.P. is -3 and their product is 8. Find the numbers.
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 18
The sum of three consecutive numbers in an A.P. is 24 and the sum of their squares is 194. Find the numbers.
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 18
The sum of three numbers in an A.P. is 30, and the ratio of first to third is 3:7. Find the numbers.
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 18
Divide 32 into four parts which are in A.P. such that the product of extremes is to the product of means is 7:15.
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 19
The sum of the third and the seventh terms of an A.P. is 6 and their product is 8. Find the sum of first sixteen terms of the A.P.
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 19
The houses of a row are numbered from 1 to 49. Show that there is a value of n such that the sum of the numbers of the houses preceding the house numbered n is equal to the sum of the numbers of the houses following it. Find this value of n.
EASY
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 10 - Sequences and Series>EXERCISE 10.3>Q 20
A man accepts a position with an initial salary of ₹5200 per month. It is understood that he will receive an automatic increase of ₹320 in the very next month and each month thereafter. Find his salary for the tenth month.